1516656465 has 12 divisors (see below), whose sum is σ = 2628871284. Its totient is φ = 808883424.

The previous prime is 1516656451. The next prime is 1516656469. The reversal of 1516656465 is 5646566151.

1516656465 is a `hidden beast` number, since 15 + 16 + 6 + 564 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1154096784 + 362559681 = 33972^2 + 19041^2 .

It is not a de Polignac number, because 1516656465 - 2¹¹ = 1516654417 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 33703477 = 1516656465 / (1 + 5 + 1 + 6 + 6 + 5 + 6 + 4 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1516656465.

It is not an unprimeable number, because it can be changed into a prime (1516656469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16851694 + ... + 16851783.

It is an arithmetic number, because the mean of its divisors is an integer number (219072607).

Almost surely, 2^1516656465 is an apocalyptic number.

1516656465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1516656465 is a deficient number, since it is larger than the sum of its proper divisors (1112214819).

1516656465 is a wasteful number, since it uses less digits than its factorization.

1516656465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33703488 (or 33703485 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 1516656465 is about 38944.2738409641. The cubic root of 1516656465 is about 1148.9357425542.

It can be divided in two parts, 15166 and 56465, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 1516656465 in words is "one billion, five hundred sixteen million, six hundred fifty-six thousand, four hundred sixty-five".