25620787137 has 64 divisors (see below), whose sum is σ = 38773278720. Its totient is φ = 14914368000.

The previous prime is 25620787133. The next prime is 25620787169. The reversal of 25620787137 is 73178702652.

It is not a de Polignac number, because 25620787137 - 2² = 25620787133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25620787133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23354773 + ... + 23355869.

It is an arithmetic number, because the mean of its divisors is an integer number (605832480).

Almost surely, 2^25620787137 is an apocalyptic number.

It is an amenable number.

25620787137 is a deficient number, since it is larger than the sum of its proper divisors (13152491583).

25620787137 is a wasteful number, since it uses less digits than its factorization.

25620787137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414.

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 25620787137 in words is "twenty-five billion, six hundred twenty million, seven hundred eighty-seven thousand, one hundred thirty-seven".