51504665220767 has 8 divisors (see below), whose sum is σ = 56766153983952. Its totient is φ = 46339717536000.

The previous prime is 51504665220739. The next prime is 51504665220779. The reversal of 51504665220767 is 76702256640515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51504665220767 - 2²⁰ = 51504664172191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51504665220707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24135268484 + ... + 24135270617.

It is an arithmetic number, because the mean of its divisors is an integer number (7095769247994).

Almost surely, 2^{51504665220767} is an apocalyptic number.

51504665220767 is a deficient number, since it is larger than the sum of its proper divisors (5261488763185).

51504665220767 is a wasteful number, since it uses less digits than its factorization.

51504665220767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48270539209.

The product of its (nonzero) digits is 21168000, while the sum is 56.

The spelling of 51504665220767 in words is "fifty-one trillion, five hundred four billion, six hundred sixty-five million, two hundred twenty thousand, seven hundred sixty-seven".