51255166868 has 24 divisors (see below), whose sum is σ = 93847383168. Its totient is φ = 24447604896.

The previous prime is 51255166759. The next prime is 51255166871. The reversal of 51255166868 is 86866155215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712496 + ... + 781127.

It is an arithmetic number, because the mean of its divisors is an integer number (3910307632).

Almost surely, 2^51255166868 is an apocalyptic number.

It is an amenable number.

51255166868 is a deficient number, since it is larger than the sum of its proper divisors (42592216300).

51255166868 is a wasteful number, since it uses less digits than its factorization.

51255166868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494023 (or 1494021 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 53.

The spelling of 51255166868 in words is "fifty-one billion, two hundred fifty-five million, one hundred sixty-six thousand, eight hundred sixty-eight".