51685767372 has 24 divisors (see below), whose sum is σ = 120642984000. Its totient is φ = 17222466256.

The previous prime is 51685767361. The next prime is 51685767373. The reversal of 51685767372 is 27376758615.

It is not an unprimeable number, because it can be changed into a prime (51685767373) 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, 730122 + ... + 797777.

It is an arithmetic number, because the mean of its divisors is an integer number (5026791000).

Almost surely, 2^51685767372 is an apocalyptic number.

It is an amenable number.

51685767372 is an abundant number, since it is smaller than the sum of its proper divisors (68957216628).

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

51685767372 is a wasteful number, since it uses less digits than its factorization.

51685767372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530725 (or 1530723 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 57.

The spelling of 51685767372 in words is "fifty-one billion, six hundred eighty-five million, seven hundred sixty-seven thousand, three hundred seventy-two".