51664929256 has 32 divisors (see below), whose sum is σ = 101097077760. Its totient is φ = 24706009152.

The previous prime is 51664929229. The next prime is 51664929259. The reversal of 51664929256 is 65292946615.

It is a junction number, because it is equal to n+sod(n) for n = 51664929197 and 51664929206.

It is not an unprimeable number, because it can be changed into a prime (51664929259) 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, 1882126 + ... + 1909378.

It is an arithmetic number, because the mean of its divisors is an integer number (3159283680).

Almost surely, 2^51664929256 is an apocalyptic number.

It is an amenable number.

51664929256 is a deficient number, since it is larger than the sum of its proper divisors (49432148504).

51664929256 is a wasteful number, since it uses less digits than its factorization.

51664929256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37585 (or 37581 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 55.

The spelling of 51664929256 in words is "fifty-one billion, six hundred sixty-four million, nine hundred twenty-nine thousand, two hundred fifty-six".