51440536572672 has 72 divisors (see below), whose sum is σ = 147438140509744. Its totient is φ = 15827857403904.

The previous prime is 51440536572653. The next prime is 51440536572679. The reversal of 51440536572672 is 27627563504415.

It is a super-2 number, since 2×51440536572672² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51440536572679) 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, 2576138683 + ... + 2576158650.

Almost surely, 2^{51440536572672} is an apocalyptic number.

51440536572672 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51440536572672 is an abundant number, since it is smaller than the sum of its proper divisors (95997603937072).

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

51440536572672 is a wasteful number, since it uses less digits than its factorization.

51440536572672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5152297365 (or 5152297351 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 57.

The spelling of 51440536572672 in words is "fifty-one trillion, four hundred forty billion, five hundred thirty-six million, five hundred seventy-two thousand, six hundred seventy-two".