1516051665 has 24 divisors (see below), whose sum is σ = 2637835200. Its totient is φ = 805480224.

The previous prime is 1516051657. The next prime is 1516051699. The reversal of 1516051665 is 5661506151.

It is not a de Polignac number, because 1516051665 - 2³ = 1516051657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52215 + ... + 75884.

It is an arithmetic number, because the mean of its divisors is an integer number (109909800).

Almost surely, 2^1516051665 is an apocalyptic number.

1516051665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1516051665 is a deficient number, since it is larger than the sum of its proper divisors (1121783535).

1516051665 is a wasteful number, since it uses less digits than its factorization.

1516051665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128373 (or 128370 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1516051665 is about 38936.5081254085. The cubic root of 1516051665 is about 1148.7830011481.

The spelling of 1516051665 in words is "one billion, five hundred sixteen million, fifty-one thousand, six hundred sixty-five".