25645624770 has 32 divisors (see below), whose sum is σ = 61617127680. Its totient is φ = 6831319040.

The previous prime is 25645624769. The next prime is 25645624787. The reversal of 25645624770 is 7742654652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441855 + ... + 496514.

It is an arithmetic number, because the mean of its divisors is an integer number (1925535240).

Almost surely, 2^25645624770 is an apocalyptic number.

25645624770 is an abundant number, since it is smaller than the sum of its proper divisors (35971502910).

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

25645624770 is a wasteful number, since it uses less digits than its factorization.

25645624770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939290.

The product of its (nonzero) digits is 2822400, while the sum is 48.

The spelling of 25645624770 in words is "twenty-five billion, six hundred forty-five million, six hundred twenty-four thousand, seven hundred seventy".