851818841616 has 80 divisors (see below), whose sum is σ = 2276699549760. Its totient is φ = 274114014720.

The previous prime is 851818841603. The next prime is 851818841633. The reversal of 851818841616 is 616148818158.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12453526 + ... + 12521738.

It is an arithmetic number, because the mean of its divisors is an integer number (28458744372).

Almost surely, 2^851818841616 is an apocalyptic number.

It is an amenable number.

851818841616 is an abundant number, since it is smaller than the sum of its proper divisors (1424880708144).

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

851818841616 is a wasteful number, since it uses less digits than its factorization.

851818841616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77224 (or 77218 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 57.

The spelling of 851818841616 in words is "eight hundred fifty-one billion, eight hundred eighteen million, eight hundred forty-one thousand, six hundred sixteen".