634808013642 has 24 divisors (see below), whose sum is σ = 1500455305440. Its totient is φ = 192366064680.

The previous prime is 634808013589. The next prime is 634808013647. The reversal of 634808013642 is 246310808436.

634808013642 is a `hidden beast` number, since 63 + 480 + 80 + 1 + 36 + 4 + 2 = 666.

It is a super-3 number, since 3×634808013642³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (634808013647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1603050342 + ... + 1603050737.

It is an arithmetic number, because the mean of its divisors is an integer number (62518971060).

Almost surely, 2^634808013642 is an apocalyptic number.

634808013642 is an abundant number, since it is smaller than the sum of its proper divisors (865647291798).

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

634808013642 is a wasteful number, since it uses less digits than its factorization.

634808013642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206101098 (or 3206101095 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 634808013642 in words is "six hundred thirty-four billion, eight hundred eight million, thirteen thousand, six hundred forty-two".