634651990994 has 8 divisors (see below), whose sum is σ = 1087974841728. Its totient is φ = 271993710420.

The previous prime is 634651990949. The next prime is 634651991009. The reversal of 634651990994 is 499099156436.

634651990994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 634651990994.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22666142522 + ... + 22666142549.

It is an arithmetic number, because the mean of its divisors is an integer number (135996855216).

Almost surely, 2^634651990994 is an apocalyptic number.

634651990994 is a deficient number, since it is larger than the sum of its proper divisors (453322850734).

634651990994 is a wasteful number, since it uses less digits than its factorization.

634651990994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45332285080.

The product of its (nonzero) digits is 56687040, while the sum is 65.

The spelling of 634651990994 in words is "six hundred thirty-four billion, six hundred fifty-one million, nine hundred ninety thousand, nine hundred ninety-four".