51564133636 has 12 divisors (see below), whose sum is σ = 92438142300. Its totient is φ = 25153235840.

The previous prime is 51564133609. The next prime is 51564133693. The reversal of 51564133636 is 63633146515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9772508736 + 41791624900 = 98856^2 + 204430^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51564133592 and 51564133601.

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, 157207561 + ... + 157207888.

It is an arithmetic number, because the mean of its divisors is an integer number (7703178525).

Almost surely, 2^51564133636 is an apocalyptic number.

It is an amenable number.

51564133636 is a deficient number, since it is larger than the sum of its proper divisors (40874008664).

51564133636 is a wasteful number, since it uses less digits than its factorization.

51564133636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314415494 (or 314415492 counting only the distinct ones).

The product of its digits is 583200, while the sum is 43.

The spelling of 51564133636 in words is "fifty-one billion, five hundred sixty-four million, one hundred thirty-three thousand, six hundred thirty-six".