51765901656660 has 36 divisors (see below), whose sum is σ = 157023235025748. Its totient is φ = 13804240441728.

The previous prime is 51765901656653. The next prime is 51765901656683. The reversal of 51765901656660 is 6665610956715.

It can be written as a sum of positive squares in 2 ways, for example, as 33393396804804 + 18372504851856 = 5778702^2 + 4286316^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143794171089 + ... + 143794171448.

It is an arithmetic number, because the mean of its divisors is an integer number (4361756528493).

Almost surely, 2^{51765901656660} is an apocalyptic number.

It is an amenable number.

51765901656660 is an abundant number, since it is smaller than the sum of its proper divisors (105257333369088).

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

51765901656660 is a wasteful number, since it uses less digits than its factorization.

51765901656660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287588342552 (or 287588342547 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 63.

The spelling of 51765901656660 in words is "fifty-one trillion, seven hundred sixty-five billion, nine hundred one million, six hundred fifty-six thousand, six hundred sixty".