51523905320 has 64 divisors (see below), whose sum is σ = 123384442320. Its totient is φ = 19296681984.

The previous prime is 51523905313. The next prime is 51523905347. The reversal of 51523905320 is 2350932515.

It can be written as a sum of positive squares in 8 ways, for example, as 9407836036 + 42116069284 = 96994^2 + 205222^2 .

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 15 ways as a sum of consecutive naturals, for example, 65057 + ... + 327536.

Almost surely, 2^51523905320 is an apocalyptic number.

It is an amenable number.

51523905320 is an abundant number, since it is smaller than the sum of its proper divisors (71860537000).

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

51523905320 is a wasteful number, since it uses less digits than its factorization.

51523905320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392814 (or 392810 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 35.

The spelling of 51523905320 in words is "fifty-one billion, five hundred twenty-three million, nine hundred five thousand, three hundred twenty".