65636507136 has 80 divisors (see below), whose sum is σ = 185145699024. Its totient is φ = 20591837184.

The previous prime is 65636507077. The next prime is 65636507149. The reversal of 65636507136 is 63170563656.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 1230715 + ... + 1282938.

Almost surely, 2^65636507136 is an apocalyptic number.

It is an amenable number.

65636507136 is an abundant number, since it is smaller than the sum of its proper divisors (119509191888).

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

65636507136 is a wasteful number, since it uses less digits than its factorization.

65636507136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513691 (or 2513675 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 48.

The spelling of 65636507136 in words is "sixty-five billion, six hundred thirty-six million, five hundred seven thousand, one hundred thirty-six".