51361803168 has 96 divisors (see below), whose sum is σ = 146827598400. Its totient is φ = 15626029056.

The previous prime is 51361803167. The next prime is 51361803221. The reversal of 51361803168 is 86130816315.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (51361803167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120138 + ... + 342281.

It is an arithmetic number, because the mean of its divisors is an integer number (1529454150).

Almost surely, 2^51361803168 is an apocalyptic number.

It is an amenable number.

51361803168 is an abundant number, since it is smaller than the sum of its proper divisors (95465795232).

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

51361803168 is a wasteful number, since it uses less digits than its factorization.

51361803168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462534 (or 462526 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 51361803168 in words is "fifty-one billion, three hundred sixty-one million, eight hundred three thousand, one hundred sixty-eight".