634457995623 has 24 divisors (see below), whose sum is σ = 923793268736. Its totient is φ = 419578866000.

The previous prime is 634457995573. The next prime is 634457995627. The reversal of 634457995623 is 326599754436.

634457995623 is a `hidden beast` number, since 6 + 3 + 4 + 4 + 579 + 9 + 56 + 2 + 3 = 666.

It is not a de Polignac number, because 634457995623 - 2³³ = 625868061031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634457995627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8364438 + ... + 8439948.

Almost surely, 2^634457995623 is an apocalyptic number.

634457995623 is a deficient number, since it is larger than the sum of its proper divisors (289335273113).

634457995623 is a wasteful number, since it uses less digits than its factorization.

634457995623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82995 (or 82992 counting only the distinct ones).

The product of its digits is 146966400, while the sum is 63.

The spelling of 634457995623 in words is "six hundred thirty-four billion, four hundred fifty-seven million, nine hundred ninety-five thousand, six hundred twenty-three".