15561676918696 has 16 divisors (see below), whose sum is σ = 29467036741140. Its totient is φ = 7703800454400.

The previous prime is 15561676918639. The next prime is 15561676918727. The reversal of 15561676918696 is 69681967616551.

It can be written as a sum of positive squares in 2 ways, for example, as 12623709516196 + 2937967402500 = 3552986^2 + 1714050^2 .

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 3 ways as a sum of consecutive naturals, for example, 9629749761 + ... + 9629751376.

Almost surely, 2^{15561676918696} is an apocalyptic number.

It is an amenable number.

15561676918696 is a deficient number, since it is larger than the sum of its proper divisors (13905359822444).

15561676918696 is a wasteful number, since it uses less digits than its factorization.

15561676918696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19259501244 (or 19259501240 counting only the distinct ones).

The product of its digits is 881798400, while the sum is 76.

The spelling of 15561676918696 in words is "fifteen trillion, five hundred sixty-one billion, six hundred seventy-six million, nine hundred eighteen thousand, six hundred ninety-six".