51731823744 has 128 divisors (see below), whose sum is σ = 159319267200. Its totient is φ = 16494179328.

The previous prime is 51731823743. The next prime is 51731823749. The reversal of 51731823744 is 44732813715.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 51731823744.

It is not an unprimeable number, because it can be changed into a prime (51731823743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245919 + ... + 404894.

It is an arithmetic number, because the mean of its divisors is an integer number (1244681775).

Almost surely, 2^51731823744 is an apocalyptic number.

51731823744 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51731823744 is an abundant number, since it is smaller than the sum of its proper divisors (107587443456).

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

51731823744 is a wasteful number, since it uses less digits than its factorization.

51731823744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650859 (or 650841 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 51731823744 in words is "fifty-one billion, seven hundred thirty-one million, eight hundred twenty-three thousand, seven hundred forty-four".