51239239796 has 12 divisors (see below), whose sum is σ = 91855710660. Its totient is φ = 24994751040.

The previous prime is 51239239781. The next prime is 51239239801. The reversal of 51239239796 is 69793293215.

It can be written as a sum of positive squares in 2 ways, for example, as 688012900 + 50551226896 = 26230^2 + 224836^2 .

It is a congruent number.

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, 156217031 + ... + 156217358.

It is an arithmetic number, because the mean of its divisors is an integer number (7654642555).

Almost surely, 2^51239239796 is an apocalyptic number.

It is an amenable number.

51239239796 is a deficient number, since it is larger than the sum of its proper divisors (40616470864).

51239239796 is a wasteful number, since it uses less digits than its factorization.

51239239796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312434434 (or 312434432 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 56.

The spelling of 51239239796 in words is "fifty-one billion, two hundred thirty-nine million, two hundred thirty-nine thousand, seven hundred ninety-six".