636624157452 has 96 divisors (see below), whose sum is σ = 1535922769920. Its totient is φ = 205113323520.

The previous prime is 636624157447. The next prime is 636624157453. The reversal of 636624157452 is 254751426636.

It is a junction number, because it is equal to n+sod(n) for n = 636624157395 and 636624157404.

It is not an unprimeable number, because it can be changed into a prime (636624157453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19004574 + ... + 19038042.

It is an arithmetic number, because the mean of its divisors is an integer number (15999195520).

Almost surely, 2^636624157452 is an apocalyptic number.

It is an amenable number.

636624157452 is an abundant number, since it is smaller than the sum of its proper divisors (899298612468).

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

636624157452 is a wasteful number, since it uses less digits than its factorization.

636624157452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33903 (or 33901 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 51.

The spelling of 636624157452 in words is "six hundred thirty-six billion, six hundred twenty-four million, one hundred fifty-seven thousand, four hundred fifty-two".