51440017787718 has 96 divisors (see below), whose sum is σ = 119847025986048. Its totient is φ = 14676250680000.

The previous prime is 51440017787677. The next prime is 51440017787729. The reversal of 51440017787718 is 81778771004415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 870698796 + ... + 870757872.

It is an arithmetic number, because the mean of its divisors is an integer number (1248406520688).

Almost surely, 2^{51440017787718} is an apocalyptic number.

51440017787718 is an abundant number, since it is smaller than the sum of its proper divisors (68407008198330).

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

51440017787718 is a wasteful number, since it uses less digits than its factorization.

51440017787718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63258 (or 63251 counting only the distinct ones).

The product of its (nonzero) digits is 12293120, while the sum is 60.

The spelling of 51440017787718 in words is "fifty-one trillion, four hundred forty billion, seventeen million, seven hundred eighty-seven thousand, seven hundred eighteen".