51810910916 has 12 divisors (see below), whose sum is σ = 91566808620. Its totient is φ = 25648965600.

The previous prime is 51810910909. The next prime is 51810910933. The reversal of 51810910916 is 61901901815.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32170009600 + 19640901316 = 179360^2 + 140146^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64122011 + ... + 64122818.

It is an arithmetic number, because the mean of its divisors is an integer number (7630567385).

Almost surely, 2^51810910916 is an apocalyptic number.

It is an amenable number.

51810910916 is a deficient number, since it is larger than the sum of its proper divisors (39755897704).

51810910916 is a wasteful number, since it uses less digits than its factorization.

51810910916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128244934 (or 128244932 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 41.

The spelling of 51810910916 in words is "fifty-one billion, eight hundred ten million, nine hundred ten thousand, nine hundred sixteen".