51012840756 has 24 divisors (see below), whose sum is σ = 119035011424. Its totient is φ = 17003558880.

The previous prime is 51012840733. The next prime is 51012840757. The reversal of 51012840756 is 65704821015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51012840757) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 258366 + ... + 410826.

Almost surely, 2^51012840756 is an apocalyptic number.

It is an amenable number.

51012840756 is an abundant number, since it is smaller than the sum of its proper divisors (68022170668).

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

51012840756 is a wasteful number, since it uses less digits than its factorization.

51012840756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180351 (or 180349 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 51012840756 in words is "fifty-one billion, twelve million, eight hundred forty thousand, seven hundred fifty-six".