51137650564 has 96 divisors (see below), whose sum is σ = 127223744256. Its totient is φ = 17309306880.

The previous prime is 51137650537. The next prime is 51137650633. The reversal of 51137650564 is 46505673115.

It is a self number, because there is not a number n which added to its sum of digits gives 51137650564.

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 31 ways as a sum of consecutive naturals, for example, 307569 + ... + 443704.

It is an arithmetic number, because the mean of its divisors is an integer number (1325247336).

Almost surely, 2^51137650564 is an apocalyptic number.

It is an amenable number.

51137650564 is an abundant number, since it is smaller than the sum of its proper divisors (76086093692).

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

51137650564 is a wasteful number, since it uses less digits than its factorization.

51137650564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751325 (or 751323 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 51137650564 in words is "fifty-one billion, one hundred thirty-seven million, six hundred fifty thousand, five hundred sixty-four".