51086517202765 has 8 divisors (see below), whose sum is σ = 66876895247328. Its totient is φ = 37153830692880.

The previous prime is 51086517202751. The next prime is 51086517202933. The reversal of 51086517202765 is 56720271568015.

It is a happy number.

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

It is not a de Polignac number, because 51086517202765 - 2¹⁵ = 51086517169997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 928845767323 = 51086517202765 / (5 + 1 + 0 + 8 + 6 + 5 + 1 + 7 + 2 + 0 + 2 + 7 + 6 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464422883607 + ... + 464422883716.

It is an arithmetic number, because the mean of its divisors is an integer number (8359611905916).

Almost surely, 2^{51086517202765} is an apocalyptic number.

51086517202765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51086517202765 is a deficient number, since it is larger than the sum of its proper divisors (15790378044563).

51086517202765 is a wasteful number, since it uses less digits than its factorization.

51086517202765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928845767339.

The product of its (nonzero) digits is 7056000, while the sum is 55.

The spelling of 51086517202765 in words is "fifty-one trillion, eighty-six billion, five hundred seventeen million, two hundred two thousand, seven hundred sixty-five".