15499294985 has 16 divisors (see below), whose sum is σ = 19375735680. Its totient is φ = 11891967360.

The previous prime is 15499294913. The next prime is 15499294991. The reversal of 15499294985 is 58949299451.

It is not a de Polignac number, because 15499294985 - 2⁸ = 15499294729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 628637 + ... + 652826.

It is an arithmetic number, because the mean of its divisors is an integer number (1210983480).

Almost surely, 2^15499294985 is an apocalyptic number.

It is an amenable number.

15499294985 is a deficient number, since it is larger than the sum of its proper divisors (3876440695).

15499294985 is a wasteful number, since it uses less digits than its factorization.

15499294985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281568.

The product of its digits is 41990400, while the sum is 65.

The spelling of 15499294985 in words is "fifteen billion, four hundred ninety-nine million, two hundred ninety-four thousand, nine hundred eighty-five".