25397275064 has 24 divisors (see below), whose sum is σ = 55394567640. Its totient is φ = 10884546288.

The previous prime is 25397275037. The next prime is 25397275087. The reversal of 25397275064 is 46057279352.

It is a congruent 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, 32394092 + ... + 32394875.

It is an arithmetic number, because the mean of its divisors is an integer number (2308106985).

Almost surely, 2^25397275064 is an apocalyptic number.

It is an amenable number.

25397275064 is an abundant number, since it is smaller than the sum of its proper divisors (29997292576).

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

25397275064 is a wasteful number, since it uses less digits than its factorization.

25397275064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64788987 (or 64788976 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 50.

The spelling of 25397275064 in words is "twenty-five billion, three hundred ninety-seven million, two hundred seventy-five thousand, sixty-four".