51287709312 has 96 divisors (see below), whose sum is σ = 168669427680. Its totient is φ = 14653628928.

The previous prime is 51287709301. The next prime is 51287709323. The reversal of 51287709312 is 21390778215.

51287709312 is a `hidden beast` number, since 51 + 287 + 7 + 0 + 9 + 312 = 666.

51287709312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51287709301) and next prime (51287709323).

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3171978 + ... + 3188105.

It is an arithmetic number, because the mean of its divisors is an integer number (1756973205).

Almost surely, 2^51287709312 is an apocalyptic number.

It is an amenable number.

51287709312 is an abundant number, since it is smaller than the sum of its proper divisors (117381718368).

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

51287709312 is a wasteful number, since it uses less digits than its factorization.

51287709312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360110 (or 6360095 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 51287709312 in words is "fifty-one billion, two hundred eighty-seven million, seven hundred nine thousand, three hundred twelve".