51539836272 has 20 divisors (see below), whose sum is σ = 133144577160. Its totient is φ = 17179945408.

The previous prime is 51539836247. The next prime is 51539836279. The reversal of 51539836272 is 27263893515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51539836279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536873247 + ... + 536873342.

It is an arithmetic number, because the mean of its divisors is an integer number (6657228858).

Almost surely, 2^51539836272 is an apocalyptic number.

It is an amenable number.

51539836272 is an abundant number, since it is smaller than the sum of its proper divisors (81604740888).

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

51539836272 is a wasteful number, since it uses less digits than its factorization.

51539836272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073746600 (or 1073746594 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 51539836272 in words is "fifty-one billion, five hundred thirty-nine million, eight hundred thirty-six thousand, two hundred seventy-two".