16615604631 has 8 divisors (see below), whose sum is σ = 22163861104. Its totient is φ = 11072208960.

The previous prime is 16615604627. The next prime is 16615604659. The reversal of 16615604631 is 13640651661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16615604631 - 2² = 16615604627 is a prime.

It is a super-2 number, since 2×16615604631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16615604631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16615674631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207216 + ... + 1220901.

It is an arithmetic number, because the mean of its divisors is an integer number (2770482638).

Almost surely, 2^16615604631 is an apocalyptic number.

16615604631 is a deficient number, since it is larger than the sum of its proper divisors (5548256473).

16615604631 is a wasteful number, since it uses less digits than its factorization.

16615604631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430401.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 16615604631 in words is "sixteen billion, six hundred fifteen million, six hundred four thousand, six hundred thirty-one".