51445261264 has 20 divisors (see below), whose sum is σ = 99689338720. Its totient is φ = 25718980320.

The previous prime is 51445261261. The next prime is 51445261313. The reversal of 51445261264 is 46216254415.

51445261264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51445261264² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51445261261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110022 + ... + 339109.

It is an arithmetic number, because the mean of its divisors is an integer number (4984466936).

Almost surely, 2^51445261264 is an apocalyptic number.

It is an amenable number.

51445261264 is a deficient number, since it is larger than the sum of its proper divisors (48244077456).

51445261264 is a wasteful number, since it uses less digits than its factorization.

51445261264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456298 (or 456292 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The spelling of 51445261264 in words is "fifty-one billion, four hundred forty-five million, two hundred sixty-one thousand, two hundred sixty-four".