851783021118 has 48 divisors (see below), whose sum is σ = 1942762445520. Its totient is φ = 268970347008.

The previous prime is 851783021087. The next prime is 851783021153. The reversal of 851783021118 is 811120387158.

851783021118 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8189496 + ... + 8292852.

It is an arithmetic number, because the mean of its divisors is an integer number (40474217615).

Almost surely, 2^851783021118 is an apocalyptic number.

851783021118 is an abundant number, since it is smaller than the sum of its proper divisors (1090979424402).

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

851783021118 is a wasteful number, since it uses less digits than its factorization.

851783021118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127481 (or 127478 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 45.

The spelling of 851783021118 in words is "eight hundred fifty-one billion, seven hundred eighty-three million, twenty-one thousand, one hundred eighteen".