25620535172 has 24 divisors (see below), whose sum is σ = 45723217176. Its totient is φ = 12557196288.

The previous prime is 25620535159. The next prime is 25620535177. The reversal of 25620535172 is 27153502652.

It can be written as a sum of positive squares in 4 ways, for example, as 1148938816 + 24471596356 = 33896^2 + 156434^2 .

It is not an unprimeable number, because it can be changed into a prime (25620535177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182708 + ... + 290900.

It is an arithmetic number, because the mean of its divisors is an integer number (1905134049).

Almost surely, 2^25620535172 is an apocalyptic number.

It is an amenable number.

25620535172 is a deficient number, since it is larger than the sum of its proper divisors (20102682004).

25620535172 is a wasteful number, since it uses less digits than its factorization.

25620535172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109367 (or 109365 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 38.

The spelling of 25620535172 in words is "twenty-five billion, six hundred twenty million, five hundred thirty-five thousand, one hundred seventy-two".