51410531518820 has 24 divisors (see below), whose sum is σ = 107963418972024. Its totient is φ = 20563964458496.

The previous prime is 51410531518811. The next prime is 51410531518901. The reversal of 51410531518820 is 2881513501415.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19660214112256 + 31750317406564 = 4433984^2 + 5634742^2 .

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, 13805909 + ... + 17129628.

It is an arithmetic number, because the mean of its divisors is an integer number (4498475790501).

Almost surely, 2^{51410531518820} is an apocalyptic number.

It is an amenable number.

51410531518820 is an abundant number, since it is smaller than the sum of its proper divisors (56552887453204).

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

51410531518820 is a wasteful number, since it uses less digits than its factorization.

51410531518820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31018639 (or 31018637 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 44.

The spelling of 51410531518820 in words is "fifty-one trillion, four hundred ten billion, five hundred thirty-one million, five hundred eighteen thousand, eight hundred twenty".