16155508825 has 6 divisors (see below), whose sum is σ = 20032830974. Its totient is φ = 12924407040.

The previous prime is 16155508807. The next prime is 16155508849. The reversal of 16155508825 is 52880555161.

It can be written as a sum of positive squares in 3 ways, for example, as 2609575056 + 13545933769 = 51084^2 + 116387^2 .

It is not a de Polignac number, because 16155508825 - 2²⁵ = 16121954393 is a prime.

It is a super-2 number, since 2×16155508825² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323110152 + ... + 323110201.

Almost surely, 2^16155508825 is an apocalyptic number.

It is an amenable number.

16155508825 is a deficient number, since it is larger than the sum of its proper divisors (3877322149).

16155508825 is an equidigital number, since it uses as much as digits as its factorization.

16155508825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646220363 (or 646220358 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 46.

The spelling of 16155508825 in words is "sixteen billion, one hundred fifty-five million, five hundred eight thousand, eight hundred twenty-five".