636246871144 has 16 divisors (see below), whose sum is σ = 1193780563200. Its totient is φ = 317905387632.

The previous prime is 636246871123. The next prime is 636246871159. The reversal of 636246871144 is 441178642636.

It is a junction number, because it is equal to n+sod(n) for n = 636246871091 and 636246871100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27243592 + ... + 27266935.

It is an arithmetic number, because the mean of its divisors is an integer number (74611285200).

Almost surely, 2^636246871144 is an apocalyptic number.

It is an amenable number.

636246871144 is a deficient number, since it is larger than the sum of its proper divisors (557533692056).

636246871144 is a wasteful number, since it uses less digits than its factorization.

636246871144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54511992 (or 54511988 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 52.

The spelling of 636246871144 in words is "six hundred thirty-six billion, two hundred forty-six million, eight hundred seventy-one thousand, one hundred forty-four".