634153664672 has 48 divisors (see below), whose sum is σ = 1421206057152. Its totient is φ = 275718981120.

The previous prime is 634153664671. The next prime is 634153664681. The reversal of 634153664672 is 276466351436.

It is not an unprimeable number, because it can be changed into a prime (634153664671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39156533 + ... + 39172724.

It is an arithmetic number, because the mean of its divisors is an integer number (29608459524).

Almost surely, 2^634153664672 is an apocalyptic number.

It is an amenable number.

634153664672 is an abundant number, since it is smaller than the sum of its proper divisors (787052392480).

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

634153664672 is a wasteful number, since it uses less digits than its factorization.

634153664672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78329301 (or 78329293 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 53.

The spelling of 634153664672 in words is "six hundred thirty-four billion, one hundred fifty-three million, six hundred sixty-four thousand, six hundred seventy-two".