25000220864 has 14 divisors (see below), whose sum is σ = 49609813404. Its totient is φ = 12500110400.

The previous prime is 25000220809. The next prime is 25000220879. The reversal of 25000220864 is 46802200052.

It is a super-2 number, since 2×25000220864² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195314162 + ... + 195314289.

Almost surely, 2^25000220864 is an apocalyptic number.

It is an amenable number.

25000220864 is a deficient number, since it is larger than the sum of its proper divisors (24609592540).

25000220864 is an equidigital number, since it uses as much as digits as its factorization.

25000220864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390628463 (or 390628453 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 25000220864 in words is "twenty-five billion, two hundred twenty thousand, eight hundred sixty-four".