15616216711625 has 24 divisors (see below), whose sum is σ = 20030005411416. Its totient is φ = 12155325307200.

The previous prime is 15616216711519. The next prime is 15616216711639. The reversal of 15616216711625 is 52611761261651.

It can be written as a sum of positive squares in 12 ways, for example, as 446539351696 + 15169677359929 = 668236^2 + 3894827^2 .

It is not a de Polignac number, because 15616216711625 - 2⁸ = 15616216711369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45456974 + ... + 45799223.

It is an arithmetic number, because the mean of its divisors is an integer number (834583558809).

Almost surely, 2^{15616216711625} is an apocalyptic number.

It is an amenable number.

15616216711625 is a deficient number, since it is larger than the sum of its proper divisors (4413788699791).

15616216711625 is an frugal number, since it uses more digits than its factorization.

15616216711625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91256286 (or 91256239 counting only the distinct ones).

The product of its digits is 907200, while the sum is 50.

The spelling of 15616216711625 in words is "fifteen trillion, six hundred sixteen billion, two hundred sixteen million, seven hundred eleven thousand, six hundred twenty-five".