15664625015 has 16 divisors (see below), whose sum is σ = 20714298528. Its totient is φ = 11298704256.

The previous prime is 15664624931. The next prime is 15664625023. The reversal of 15664625015 is 51052646651.

It is a cyclic number.

It is not a de Polignac number, because 15664625015 - 2¹⁶ = 15664559479 is a prime.

It is a Duffinian number.

It is a congruent 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, 2799464 + ... + 2805053.

It is an arithmetic number, because the mean of its divisors is an integer number (1294643658).

Almost surely, 2^15664625015 is an apocalyptic number.

15664625015 is a deficient number, since it is larger than the sum of its proper divisors (5049673513).

15664625015 is a wasteful number, since it uses less digits than its factorization.

15664625015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604578.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 15664625015 in words is "fifteen billion, six hundred sixty-four million, six hundred twenty-five thousand, fifteen".