18108546625 has 64 divisors (see below), whose sum is σ = 26002057536. Its totient is φ = 12472320000.

The previous prime is 18108546607. The next prime is 18108546671. The reversal of 18108546625 is 52664580181.

It is a Cunningham number, because it is equal to 134568²+1.

It can be written as a sum of positive squares in 32 ways, for example, as 17789424129 + 319122496 = 133377^2 + 17864^2 .

It is not a de Polignac number, because 18108546625 - 2²³ = 18100158017 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3118725 + ... + 3124525.

It is an arithmetic number, because the mean of its divisors is an integer number (406282149).

Almost surely, 2^18108546625 is an apocalyptic number.

It is an amenable number.

18108546625 is a deficient number, since it is larger than the sum of its proper divisors (7893510911).

18108546625 is a wasteful number, since it uses less digits than its factorization.

18108546625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959 (or 5949 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 18108546625 in words is "eighteen billion, one hundred eight million, five hundred forty-six thousand, six hundred twenty-five".