15985836956 has 6 divisors (see below), whose sum is σ = 27975214680. Its totient is φ = 7992918476.

The previous prime is 15985836931. The next prime is 15985836989. The reversal of 15985836956 is 65963858951.

15985836956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15985836892 and 15985836901.

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 as a sum of consecutive naturals, namely, 1998229616 + ... + 1998229623.

It is an arithmetic number, because the mean of its divisors is an integer number (4662535780).

Almost surely, 2^15985836956 is an apocalyptic number.

It is an amenable number.

15985836956 is a deficient number, since it is larger than the sum of its proper divisors (11989377724).

15985836956 is a wasteful number, since it uses less digits than its factorization.

15985836956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996459243 (or 3996459241 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 65.

The spelling of 15985836956 in words is "fifteen billion, nine hundred eighty-five million, eight hundred thirty-six thousand, nine hundred fifty-six".