51401766518370 has 512 divisors, whose sum is σ = 154488560256000. Its totient is φ = 12099793305600.

The previous prime is 51401766518327. The next prime is 51401766518407. The reversal of 51401766518370 is 7381566710415.

51401766518370 is a `hidden beast` number, since 5 + 1 + 40 + 17 + 6 + 6 + 518 + 3 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 712501761 + ... + 712573899.

It is an arithmetic number, because the mean of its divisors is an integer number (301735469250).

Almost surely, 2^{51401766518370} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51401766518370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77244280128000).

51401766518370 is an abundant number, since it is smaller than the sum of its proper divisors (103086793737630).

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

51401766518370 is a wasteful number, since it uses less digits than its factorization.

51401766518370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72355 (or 72349 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 51401766518370 in words is "fifty-one trillion, four hundred one billion, seven hundred sixty-six million, five hundred eighteen thousand, three hundred seventy".