65001808136 has 16 divisors (see below), whose sum is σ = 121912084800. Its totient is φ = 32491918864.

The previous prime is 65001808117. The next prime is 65001808139. The reversal of 65001808136 is 63180810056.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65001808136.

It is not an unprimeable number, because it can be changed into a prime (65001808139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092356 + ... + 1150323.

It is an arithmetic number, because the mean of its divisors is an integer number (7619505300).

Almost surely, 2^65001808136 is an apocalyptic number.

It is an amenable number.

65001808136 is a deficient number, since it is larger than the sum of its proper divisors (56910276664).

65001808136 is a wasteful number, since it uses less digits than its factorization.

65001808136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246308 (or 2246304 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 65001808136 in words is "sixty-five billion, one million, eight hundred eight thousand, one hundred thirty-six".