51010505916 has 12 divisors (see below), whose sum is σ = 119024513832. Its totient is φ = 17003501968.

The previous prime is 51010505867. The next prime is 51010505933. The reversal of 51010505916 is 61950501015.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125437735 + ... + 2125437758.

It is an arithmetic number, because the mean of its divisors is an integer number (9918709486).

Almost surely, 2^51010505916 is an apocalyptic number.

It is an amenable number.

51010505916 is an abundant number, since it is smaller than the sum of its proper divisors (68014007916).

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

51010505916 is a wasteful number, since it uses less digits than its factorization.

51010505916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250875500 (or 4250875498 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 33.

The spelling of 51010505916 in words is "fifty-one billion, ten million, five hundred five thousand, nine hundred sixteen".