15997170436 has 24 divisors (see below), whose sum is σ = 31121049344. Its totient is φ = 7145137440.

The previous prime is 15997170421. The next prime is 15997170437. The reversal of 15997170436 is 63407179951.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (15997170437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4960290 + ... + 4963513.

Almost surely, 2^15997170436 is an apocalyptic number.

It is an amenable number.

15997170436 is a deficient number, since it is larger than the sum of its proper divisors (15123878908).

15997170436 is a wasteful number, since it uses less digits than its factorization.

15997170436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9923851 (or 9923849 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 52.

The spelling of 15997170436 in words is "fifteen billion, nine hundred ninety-seven million, one hundred seventy thousand, four hundred thirty-six".