63634423775 has 96 divisors (see below), whose sum is σ = 90062152320. Its totient is φ = 44271360000.

The previous prime is 63634423753. The next prime is 63634423799. The reversal of 63634423775 is 57732443636.

It is not a de Polignac number, because 63634423775 - 2⁶ = 63634423711 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 86813309 + ... + 86814041.

It is an arithmetic number, because the mean of its divisors is an integer number (938147420).

Almost surely, 2^63634423775 is an apocalyptic number.

63634423775 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

63634423775 is a deficient number, since it is larger than the sum of its proper divisors (26427728545).

63634423775 is a wasteful number, since it uses less digits than its factorization.

63634423775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 992 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 50.

The spelling of 63634423775 in words is "sixty-three billion, six hundred thirty-four million, four hundred twenty-three thousand, seven hundred seventy-five".