51340387508818 has 16 divisors (see below), whose sum is σ = 77025184185600. Its totient is φ = 25665326393616.

The previous prime is 51340387508807. The next prime is 51340387508849. The reversal of 51340387508818 is 81880578304315.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583349605 + ... + 583437607.

It is an arithmetic number, because the mean of its divisors is an integer number (4814074011600).

Almost surely, 2^{51340387508818} is an apocalyptic number.

51340387508818 is a deficient number, since it is larger than the sum of its proper divisors (25684796676782).

51340387508818 is a wasteful number, since it uses less digits than its factorization.

51340387508818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140001.

The product of its (nonzero) digits is 25804800, while the sum is 61.

The spelling of 51340387508818 in words is "fifty-one trillion, three hundred forty billion, three hundred eighty-seven million, five hundred eight thousand, eight hundred eighteen".