636663561532116 has 12 divisors (see below), whose sum is σ = 1485548310241632. Its totient is φ = 212221187177368.

The previous prime is 636663561532067. The next prime is 636663561532199. The reversal of 636663561532116 is 611235165366636.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×636663561532116² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 636663561532116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26527648397160 + ... + 26527648397183.

It is an arithmetic number, because the mean of its divisors is an integer number (123795692520136).

Almost surely, 2^{636663561532116} is an apocalyptic number.

It is an amenable number.

636663561532116 is an abundant number, since it is smaller than the sum of its proper divisors (848884748709516).

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

636663561532116 is a wasteful number, since it uses less digits than its factorization.

636663561532116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53055296794350 (or 53055296794348 counting only the distinct ones).

The product of its digits is 62985600, while the sum is 60.

The spelling of 636663561532116 in words is "six hundred thirty-six trillion, six hundred sixty-three billion, five hundred sixty-one million, five hundred thirty-two thousand, one hundred sixteen".