125813221828 has 48 divisors (see below), whose sum is σ = 259408979200. Its totient is φ = 53364019968.

The previous prime is 125813221799. The next prime is 125813221871. The reversal of 125813221828 is 828122318521.

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, 339600 + ... + 605767.

Almost surely, 2^125813221828 is an apocalyptic number.

It is an amenable number.

125813221828 is an abundant number, since it is smaller than the sum of its proper divisors (133595757372).

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

125813221828 is an equidigital number, since it uses as much as digits as its factorization.

125813221828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945489 (or 945473 counting only the distinct ones).

The product of its digits is 122880, while the sum is 43.

The spelling of 125813221828 in words is "one hundred twenty-five billion, eight hundred thirteen million, two hundred twenty-one thousand, eight hundred twenty-eight".