634998160816 has 20 divisors (see below), whose sum is σ = 1272733383600. Its totient is φ = 306550836032.

The previous prime is 634998160807. The next prime is 634998160831. The reversal of 634998160816 is 618061899436.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684264796 + ... + 684265723.

It is an arithmetic number, because the mean of its divisors is an integer number (63636669180).

Almost surely, 2^634998160816 is an apocalyptic number.

It is an amenable number.

634998160816 is an abundant number, since it is smaller than the sum of its proper divisors (637735222784).

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

634998160816 is a wasteful number, since it uses less digits than its factorization.

634998160816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368530556 (or 1368530550 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 61.

The spelling of 634998160816 in words is "six hundred thirty-four billion, nine hundred ninety-eight million, one hundred sixty thousand, eight hundred sixteen".