51653431564 has 48 divisors (see below), whose sum is σ = 103817016576. Its totient is φ = 22028040000.

The previous prime is 51653431561. The next prime is 51653431631. The reversal of 51653431564 is 46513435615.

It is a self number, because there is not a number n which added to its sum of digits gives 51653431564.

It is not an unprimeable number, because it can be changed into a prime (51653431561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9070302 + ... + 9075994.

It is an arithmetic number, because the mean of its divisors is an integer number (2162854512).

Almost surely, 2^51653431564 is an apocalyptic number.

It is an amenable number.

51653431564 is an abundant number, since it is smaller than the sum of its proper divisors (52163585012).

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

51653431564 is a wasteful number, since it uses less digits than its factorization.

51653431564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246 (or 7244 counting only the distinct ones).

The product of its digits is 648000, while the sum is 43.

The spelling of 51653431564 in words is "fifty-one billion, six hundred fifty-three million, four hundred thirty-one thousand, five hundred sixty-four".