16252015815 has 24 divisors (see below), whose sum is σ = 32194470048. Its totient is φ = 7429492800.

The previous prime is 16252015781. The next prime is 16252015849. The reversal of 16252015815 is 51851025261.

16252015815 is a `hidden beast` number, since 1 + 625 + 2 + 0 + 15 + 8 + 15 = 666.

It is an interprime number because it is at equal distance from previous prime (16252015781) and next prime (16252015849).

It is not a de Polignac number, because 16252015815 - 2⁶ = 16252015751 is a prime.

It is a super-2 number, since 2×16252015815² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16252015815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25796536 + ... + 25797165.

It is an arithmetic number, because the mean of its divisors is an integer number (1341436252).

Almost surely, 2^16252015815 is an apocalyptic number.

16252015815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16252015815 is a deficient number, since it is larger than the sum of its proper divisors (15942454233).

16252015815 is a wasteful number, since it uses less digits than its factorization.

16252015815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51593719 (or 51593716 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 36.

The spelling of 16252015815 in words is "sixteen billion, two hundred fifty-two million, fifteen thousand, eight hundred fifteen".