51872260657686 has 64 divisors (see below), whose sum is σ = 121332307312128. Its totient is φ = 14474809133568.

The previous prime is 51872260657673. The next prime is 51872260657691. The reversal of 51872260657686 is 68675606227815.

It is a self number, because there is not a number n which added to its sum of digits gives 51872260657686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21298920 + ... + 23609076.

It is an arithmetic number, because the mean of its divisors is an integer number (1895817301752).

Almost surely, 2^{51872260657686} is an apocalyptic number.

51872260657686 is an abundant number, since it is smaller than the sum of its proper divisors (69460046654442).

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

51872260657686 is a wasteful number, since it uses less digits than its factorization.

51872260657686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322645.

The product of its (nonzero) digits is 406425600, while the sum is 69.

The spelling of 51872260657686 in words is "fifty-one trillion, eight hundred seventy-two billion, two hundred sixty million, six hundred fifty-seven thousand, six hundred eighty-six".