634297878692 has 6 divisors (see below), whose sum is σ = 1110021287718. Its totient is φ = 317148939344.

The previous prime is 634297878671. The next prime is 634297878757. The reversal of 634297878692 is 296878792436.

It can be written as a sum of positive squares in only one way, i.e., 582361291876 + 51936586816 = 763126^2 + 227896^2 .

It is a super-2 number, since 2×634297878692² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79287234833 + ... + 79287234840.

It is an arithmetic number, because the mean of its divisors is an integer number (185003547953).

Almost surely, 2^634297878692 is an apocalyptic number.

It is an amenable number.

634297878692 is a deficient number, since it is larger than the sum of its proper divisors (475723409026).

634297878692 is a wasteful number, since it uses less digits than its factorization.

634297878692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158574469677 (or 158574469675 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 71.

The spelling of 634297878692 in words is "six hundred thirty-four billion, two hundred ninety-seven million, eight hundred seventy-eight thousand, six hundred ninety-two".