51357573536 has 24 divisors (see below), whose sum is σ = 103842934020. Its totient is φ = 24984764928.

The previous prime is 51357573523. The next prime is 51357573559. The reversal of 51357573536 is 63537575315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49927221136 + 1430352400 = 223444^2 + 37820^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21686981 + ... + 21689348.

Almost surely, 2^51357573536 is an apocalyptic number.

It is an amenable number.

51357573536 is an abundant number, since it is smaller than the sum of its proper divisors (52485360484).

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

51357573536 is a wasteful number, since it uses less digits than its factorization.

51357573536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43376376 (or 43376368 counting only the distinct ones).

The product of its digits is 4961250, while the sum is 50.

The spelling of 51357573536 in words is "fifty-one billion, three hundred fifty-seven million, five hundred seventy-three thousand, five hundred thirty-six".