636634429046 has 16 divisors (see below), whose sum is σ = 1190589062400. Its totient is φ = 248039387880.

The previous prime is 636634429031. The next prime is 636634429051. The reversal of 636634429046 is 640924436636.

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, 2066994746 + ... + 2066995053.

It is an arithmetic number, because the mean of its divisors is an integer number (74411816400).

Almost surely, 2^636634429046 is an apocalyptic number.

636634429046 is a deficient number, since it is larger than the sum of its proper divisors (553954633354).

636634429046 is a wasteful number, since it uses less digits than its factorization.

636634429046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133989819.

The product of its (nonzero) digits is 13436928, while the sum is 53.

The spelling of 636634429046 in words is "six hundred thirty-six billion, six hundred thirty-four million, four hundred twenty-nine thousand, forty-six".