51371681355744 has 24 divisors (see below), whose sum is σ = 134850663559080. Its totient is φ = 17123893785216.

The previous prime is 51371681355721. The next prime is 51371681355751. The reversal of 51371681355744 is 44755318617315.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267560840299 + ... + 267560840490.

It is an arithmetic number, because the mean of its divisors is an integer number (5618777648295).

Almost surely, 2^{51371681355744} is an apocalyptic number.

It is an amenable number.

51371681355744 is an abundant number, since it is smaller than the sum of its proper divisors (83478982203336).

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

51371681355744 is a wasteful number, since it uses less digits than its factorization.

51371681355744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535121680802 (or 535121680794 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 60.

The spelling of 51371681355744 in words is "fifty-one trillion, three hundred seventy-one billion, six hundred eighty-one million, three hundred fifty-five thousand, seven hundred forty-four".