634121172044 has 24 divisors (see below), whose sum is σ = 1120638486240. Its totient is φ = 313944291584.

The previous prime is 634121172037. The next prime is 634121172079. The reversal of 634121172044 is 440271121436.

It is a junction number, because it is equal to n+sod(n) for n = 634121171995 and 634121172013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234584 + ... + 1150335.

It is an arithmetic number, because the mean of its divisors is an integer number (46693270260).

Almost surely, 2^634121172044 is an apocalyptic number.

It is an amenable number.

634121172044 is a deficient number, since it is larger than the sum of its proper divisors (486517314196).

634121172044 is a wasteful number, since it uses less digits than its factorization.

634121172044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386049 (or 1386047 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 634121172044 in words is "six hundred thirty-four billion, one hundred twenty-one million, one hundred seventy-two thousand, forty-four".