634857860432 has 10 divisors (see below), whose sum is σ = 1230037104618. Its totient is φ = 317428930208.

The previous prime is 634857860407. The next prime is 634857860467. The reversal of 634857860432 is 234068758436.

It can be written as a sum of positive squares in only one way, i.e., 453947147536 + 180910712896 = 673756^2 + 425336^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19839308123 + ... + 19839308154.

Almost surely, 2^634857860432 is an apocalyptic number.

It is an amenable number.

634857860432 is a deficient number, since it is larger than the sum of its proper divisors (595179244186).

634857860432 is a wasteful number, since it uses less digits than its factorization.

634857860432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39678616285 (or 39678616279 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 56.

The spelling of 634857860432 in words is "six hundred thirty-four billion, eight hundred fifty-seven million, eight hundred sixty thousand, four hundred thirty-two".