51010565660 has 24 divisors (see below), whose sum is σ = 107135735616. Its totient is φ = 20401645760.

The previous prime is 51010565629. The next prime is 51010565717. The reversal of 51010565660 is 6656501015.

It is a self number, because there is not a number n which added to its sum of digits gives 51010565660.

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, 4994 + ... + 319446.

It is an arithmetic number, because the mean of its divisors is an integer number (4463988984).

Almost surely, 2^51010565660 is an apocalyptic number.

It is an amenable number.

51010565660 is an abundant number, since it is smaller than the sum of its proper divisors (56125169956).

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

51010565660 is a wasteful number, since it uses less digits than its factorization.

51010565660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322573 (or 322571 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 51010565660 in words is "fifty-one billion, ten million, five hundred sixty-five thousand, six hundred sixty".