51355380255413 has 6 divisors (see below), whose sum is σ = 55609672111074. Its totient is φ = 47404966389456.

The previous prime is 51355380255359. The next prime is 51355380255449. The reversal of 51355380255413 is 31455208355315.

It can be written as a sum of positive squares in 3 ways, for example, as 13325931844 + 51342054323569 = 115438^2 + 7165337^2 .

It is not a de Polignac number, because 51355380255413 - 2⁶ = 51355380255349 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 (51355380255493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151938994670 + ... + 151938995007.

It is an arithmetic number, because the mean of its divisors is an integer number (9268278685179).

Almost surely, 2^{51355380255413} is an apocalyptic number.

It is an amenable number.

51355380255413 is a deficient number, since it is larger than the sum of its proper divisors (4254291855661).

51355380255413 is a wasteful number, since it uses less digits than its factorization.

51355380255413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303877989703 (or 303877989690 counting only the distinct ones).

The product of its (nonzero) digits is 5400000, while the sum is 50.

The spelling of 51355380255413 in words is "fifty-one trillion, three hundred fifty-five billion, three hundred eighty million, two hundred fifty-five thousand, four hundred thirteen".