51374947968 has 48 divisors (see below), whose sum is σ = 147836767650. Its totient is φ = 17124982272.

The previous prime is 51374947961. The next prime is 51374948017. The reversal of 51374947968 is 86974947315.

51374947968 is a `hidden beast` number, since 5 + 13 + 7 + 494 + 79 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25879800384 + 25495147584 = 160872^2 + 159672^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (51374947961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22297003 + ... + 22299306.

Almost surely, 2^51374947968 is an apocalyptic number.

It is an amenable number.

51374947968 is an abundant number, since it is smaller than the sum of its proper divisors (96461819682).

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

51374947968 is a wasteful number, since it uses less digits than its factorization.

51374947968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44596329 (or 44596314 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 51374947968 in words is "fifty-one billion, three hundred seventy-four million, nine hundred forty-seven thousand, nine hundred sixty-eight".