51738696720 has 60 divisors (see below), whose sum is σ = 173755792236. Its totient is φ = 13796985600.

The previous prime is 51738696697. The next prime is 51738696721. The reversal of 51738696720 is 2769683715.

51738696720 is a `hidden beast` number, since 517 + 3 + 8 + 69 + 67 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40270856976 + 11467839744 = 200676^2 + 107088^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (51738696721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35928931 + ... + 35930370.

Almost surely, 2^51738696720 is an apocalyptic number.

It is an amenable number.

51738696720 is an abundant number, since it is smaller than the sum of its proper divisors (122017095516).

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

51738696720 is a wasteful number, since it uses less digits than its factorization.

51738696720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71859320 (or 71859311 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 51738696720 in words is "fifty-one billion, seven hundred thirty-eight million, six hundred ninety-six thousand, seven hundred twenty".