638580896232 has 16 divisors (see below), whose sum is σ = 1596452240640. Its totient is φ = 212860298736.

The previous prime is 638580896221. The next prime is 638580896237. The reversal of 638580896232 is 232698085836.

It is a super-2 number, since 2×638580896232² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (638580896237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13303768648 + ... + 13303768695.

It is an arithmetic number, because the mean of its divisors is an integer number (99778265040).

Almost surely, 2^638580896232 is an apocalyptic number.

It is an amenable number.

638580896232 is an abundant number, since it is smaller than the sum of its proper divisors (957871344408).

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

638580896232 is a wasteful number, since it uses less digits than its factorization.

638580896232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26607537352 (or 26607537348 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 60.

The spelling of 638580896232 in words is "six hundred thirty-eight billion, five hundred eighty million, eight hundred ninety-six thousand, two hundred thirty-two".