51065633636 has 24 divisors (see below), whose sum is σ = 90060093816. Its totient is φ = 25334945280.

The previous prime is 51065633623. The next prime is 51065633639. The reversal of 51065633636 is 63633656015.

It can be written as a sum of positive squares in 4 ways, for example, as 14815758400 + 36249875236 = 121720^2 + 190394^2 .

It is not an unprimeable number, because it can be changed into a prime (51065633639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171410 + ... + 362646.

It is an arithmetic number, because the mean of its divisors is an integer number (3752503909).

Almost surely, 2^51065633636 is an apocalyptic number.

It is an amenable number.

51065633636 is a deficient number, since it is larger than the sum of its proper divisors (38994460180).

51065633636 is a wasteful number, since it uses less digits than its factorization.

51065633636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191759 (or 191757 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 44.

The spelling of 51065633636 in words is "fifty-one billion, sixty-five million, six hundred thirty-three thousand, six hundred thirty-six".