65156565616 has 20 divisors (see below), whose sum is σ = 126261152152. Its totient is φ = 32573042496.

The previous prime is 65156565563. The next prime is 65156565623. The reversal of 65156565616 is 61656565156.

It is a super-2 number, since 2×65156565616² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223950 + ... + 424813.

Almost surely, 2^65156565616 is an apocalyptic number.

It is an amenable number.

65156565616 is a deficient number, since it is larger than the sum of its proper divisors (61104586536).

65156565616 is a wasteful number, since it uses less digits than its factorization.

65156565616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655048 (or 655042 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 52.

The spelling of 65156565616 in words is "sixty-five billion, one hundred fifty-six million, five hundred sixty-five thousand, six hundred sixteen".