25578518964 has 12 divisors (see below), whose sum is σ = 59683210944. Its totient is φ = 8526172984.

The previous prime is 25578518923. The next prime is 25578518981. The reversal of 25578518964 is 46981587552.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 25578518898 and 25578518907.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1065771612 + ... + 1065771635.

It is an arithmetic number, because the mean of its divisors is an integer number (4973600912).

Almost surely, 2^25578518964 is an apocalyptic number.

It is an amenable number.

25578518964 is an abundant number, since it is smaller than the sum of its proper divisors (34104691980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25578518964 is a wasteful number, since it uses less digits than its factorization.

25578518964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131543254 (or 2131543252 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 60.

The spelling of 25578518964 in words is "twenty-five billion, five hundred seventy-eight million, five hundred eighteen thousand, nine hundred sixty-four".