16715664515 has 32 divisors (see below), whose sum is σ = 22242235392. Its totient is φ = 11958480000.

The previous prime is 16715664509. The next prime is 16715664521. The reversal of 16715664515 is 51546651761.

It is an interprime number because it is at equal distance from previous prime (16715664509) and next prime (16715664521).

It is a de Polignac number, because none of the positive numbers 2^k-16715664515 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16715664515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 845645 + ... + 865185.

It is an arithmetic number, because the mean of its divisors is an integer number (695069856).

Almost surely, 2^16715664515 is an apocalyptic number.

16715664515 is a deficient number, since it is larger than the sum of its proper divisors (5526570877).

16715664515 is a wasteful number, since it uses less digits than its factorization.

16715664515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19811.

The product of its digits is 756000, while the sum is 47.

The spelling of 16715664515 in words is "sixteen billion, seven hundred fifteen million, six hundred sixty-four thousand, five hundred fifteen".