51516651060 has 72 divisors (see below), whose sum is σ = 178591061376. Its totient is φ = 11775234240.

The previous prime is 51516651049. The next prime is 51516651089. The reversal of 51516651060 is 6015661515.

51516651060 is a `hidden beast` number, since 515 + 16 + 65 + 10 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20441856 + ... + 20444375.

It is an arithmetic number, because the mean of its divisors is an integer number (2480431408).

Almost surely, 2^51516651060 is an apocalyptic number.

It is an amenable number.

51516651060 is an abundant number, since it is smaller than the sum of its proper divisors (127074410316).

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

51516651060 is a wasteful number, since it uses less digits than its factorization.

51516651060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40886253 (or 40886248 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 51516651060 in words is "fifty-one billion, five hundred sixteen million, six hundred fifty-one thousand, sixty".