51086536120520 has 16 divisors (see below), whose sum is σ = 114944706271260. Its totient is φ = 20434614448192.

The previous prime is 51086536120483. The next prime is 51086536120537. The reversal of 51086536120520 is 2502163568015.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50840522104516 + 246014016004 = 7130254^2 + 495998^2 .

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, 638581701467 + ... + 638581701546.

Almost surely, 2^{51086536120520} is an apocalyptic number.

It is an amenable number.

51086536120520 is an abundant number, since it is smaller than the sum of its proper divisors (63858170150740).

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

51086536120520 is a wasteful number, since it uses less digits than its factorization.

51086536120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277163403024 (or 1277163403020 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

Adding to 51086536120520 its reverse (2502163568015), we get a palindrome (53588699688535).

The spelling of 51086536120520 in words is "fifty-one trillion, eighty-six billion, five hundred thirty-six million, one hundred twenty thousand, five hundred twenty".