634644376220 has 48 divisors (see below), whose sum is σ = 1364043276288. Its totient is φ = 247900296000.

The previous prime is 634644376213. The next prime is 634644376253. The reversal of 634644376220 is 22673446436.

It is a congruent number.

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, 4008197 + ... + 4163523.

It is an arithmetic number, because the mean of its divisors is an integer number (28417568256).

Almost surely, 2^634644376220 is an apocalyptic number.

It is an amenable number.

634644376220 is an abundant number, since it is smaller than the sum of its proper divisors (729398900068).

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

634644376220 is a wasteful number, since it uses less digits than its factorization.

634644376220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160130 (or 160128 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 47.

The spelling of 634644376220 in words is "six hundred thirty-four billion, six hundred forty-four million, three hundred seventy-six thousand, two hundred twenty".