636688106124 has 384 divisors, whose sum is σ = 1833296855040. Its totient is φ = 168148224000.

The previous prime is 636688106083. The next prime is 636688106177. The reversal of 636688106124 is 421601886636.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1556694432 + ... + 1556694840.

It is an arithmetic number, because the mean of its divisors is an integer number (4774210560).

Almost surely, 2^636688106124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636688106124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (916648427520).

636688106124 is an abundant number, since it is smaller than the sum of its proper divisors (1196608748916).

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

636688106124 is a wasteful number, since it uses less digits than its factorization.

636688106124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 636688106124 in words is "six hundred thirty-six billion, six hundred eighty-eight million, one hundred six thousand, one hundred twenty-four".