51397475344 has 40 divisors (see below), whose sum is σ = 103053951000. Its totient is φ = 24803552256.

The previous prime is 51397475333. The next prime is 51397475357. The reversal of 51397475344 is 44357479315.

It can be written as a sum of positive squares in 4 ways, for example, as 104284944 + 51293190400 = 10212^2 + 226480^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51397475291 and 51397475300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1358962 + ... + 1396270.

It is an arithmetic number, because the mean of its divisors is an integer number (2576348775).

Almost surely, 2^51397475344 is an apocalyptic number.

It is an amenable number.

51397475344 is an abundant number, since it is smaller than the sum of its proper divisors (51656475656).

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

51397475344 is a wasteful number, since it uses less digits than its factorization.

51397475344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40315 (or 40309 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 52.

The spelling of 51397475344 in words is "fifty-one billion, three hundred ninety-seven million, four hundred seventy-five thousand, three hundred forty-four".