51571807068 has 24 divisors (see below), whose sum is σ = 121502512768. Its totient is φ = 17023702896.

The previous prime is 51571807057. The next prime is 51571807081. The reversal of 51571807068 is 86070817515.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20861146 + ... + 20863617.

Almost surely, 2^51571807068 is an apocalyptic number.

It is an amenable number.

51571807068 is an abundant number, since it is smaller than the sum of its proper divisors (69930705700).

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

51571807068 is a wasteful number, since it uses less digits than its factorization.

51571807068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41724873 (or 41724871 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 48.

The spelling of 51571807068 in words is "fifty-one billion, five hundred seventy-one million, eight hundred seven thousand, sixty-eight".