51199666858 has 16 divisors (see below), whose sum is σ = 78557923584. Its totient is φ = 25015420080.

The previous prime is 51199666783. The next prime is 51199666891. The reversal of 51199666858 is 85866699115.

It is a self number, because there is not a number n which added to its sum of digits gives 51199666858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372285 + ... + 490912.

It is an arithmetic number, because the mean of its divisors is an integer number (4909870224).

Almost surely, 2^51199666858 is an apocalyptic number.

51199666858 is a deficient number, since it is larger than the sum of its proper divisors (27358256726).

51199666858 is a wasteful number, since it uses less digits than its factorization.

51199666858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863877.

The product of its digits is 27993600, while the sum is 64.

The spelling of 51199666858 in words is "fifty-one billion, one hundred ninety-nine million, six hundred sixty-six thousand, eight hundred fifty-eight".