634795657988 has 6 divisors (see below), whose sum is σ = 1110892401486. Its totient is φ = 317397828992.

The previous prime is 634795657973. The next prime is 634795658009. The reversal of 634795657988 is 889756597436.

It can be written as a sum of positive squares in only one way, i.e., 365301777604 + 269493880384 = 604402^2 + 519128^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79349457245 + ... + 79349457252.

It is an arithmetic number, because the mean of its divisors is an integer number (185148733581).

Almost surely, 2^634795657988 is an apocalyptic number.

It is an amenable number.

634795657988 is a deficient number, since it is larger than the sum of its proper divisors (476096743498).

634795657988 is a wasteful number, since it uses less digits than its factorization.

634795657988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158698914501 (or 158698914499 counting only the distinct ones).

The product of its digits is 2743372800, while the sum is 77.

The spelling of 634795657988 in words is "six hundred thirty-four billion, seven hundred ninety-five million, six hundred fifty-seven thousand, nine hundred eighty-eight".