636138233502 has 16 divisors (see below), whose sum is σ = 1339238386560. Its totient is φ = 200885757912.

The previous prime is 636138233461. The next prime is 636138233531. The reversal of 636138233502 is 205332831636.

636138233502 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 2790079858 + ... + 2790080085.

It is an arithmetic number, because the mean of its divisors is an integer number (83702399160).

Almost surely, 2^636138233502 is an apocalyptic number.

636138233502 is an abundant number, since it is smaller than the sum of its proper divisors (703100153058).

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

636138233502 is a wasteful number, since it uses less digits than its factorization.

636138233502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580159967.

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 636138233502 in words is "six hundred thirty-six billion, one hundred thirty-eight million, two hundred thirty-three thousand, five hundred two".