634661417632 has 96 divisors (see below), whose sum is σ = 1387135399104. Its totient is φ = 283429785600.

The previous prime is 634661417629. The next prime is 634661417651. The reversal of 634661417632 is 236714166436.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5228088 + ... + 5348104.

It is an arithmetic number, because the mean of its divisors is an integer number (14449327074).

Almost surely, 2^634661417632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634661417632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693567699552).

634661417632 is an abundant number, since it is smaller than the sum of its proper divisors (752473981472).

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

634661417632 is a wasteful number, since it uses less digits than its factorization.

634661417632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120302 (or 120294 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 49.

The spelling of 634661417632 in words is "six hundred thirty-four billion, six hundred sixty-one million, four hundred seventeen thousand, six hundred thirty-two".