1655044065 has 24 divisors (see below), whose sum is σ = 2967667560. Its totient is φ = 852251904.

The previous prime is 1655044057. The next prime is 1655044081. The reversal of 1655044065 is 5604405561.

1655044065 is a `hidden beast` number, since 1 + 6 + 550 + 4 + 40 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 121616784 + 1533427281 = 11028^2 + 39159^2 .

It is not a de Polignac number, because 1655044065 - 2³ = 1655044057 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, 632812 + ... + 635421.

It is an arithmetic number, because the mean of its divisors is an integer number (123652815).

Almost surely, 2^1655044065 is an apocalyptic number.

1655044065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1655044065 is a deficient number, since it is larger than the sum of its proper divisors (1312623495).

1655044065 is a wasteful number, since it uses less digits than its factorization.

1655044065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268273 (or 1268270 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1655044065 is about 40682.2327927069. The cubic root of 1655044065 is about 1182.8686465247.

The spelling of 1655044065 in words is "one billion, six hundred fifty-five million, forty-four thousand, sixty-five".