15491314657 has 16 divisors (see below), whose sum is σ = 19148088960. Its totient is φ = 12204243072.

The previous prime is 15491314613. The next prime is 15491314661. The reversal of 15491314657 is 75641319451.

It is not a de Polignac number, because 15491314657 - 2²³ = 15482926049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15491314687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344107 + ... + 386512.

It is an arithmetic number, because the mean of its divisors is an integer number (1196755560).

Almost surely, 2^15491314657 is an apocalyptic number.

It is an amenable number.

15491314657 is a deficient number, since it is larger than the sum of its proper divisors (3656774303).

15491314657 is a wasteful number, since it uses less digits than its factorization.

15491314657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730872.

The product of its digits is 453600, while the sum is 46.

The spelling of 15491314657 in words is "fifteen billion, four hundred ninety-one million, three hundred fourteen thousand, six hundred fifty-seven".