851080469940 has 72 divisors (see below), whose sum is σ = 2587211034408. Its totient is φ = 226462460160.

The previous prime is 851080469929. The next prime is 851080469959. The reversal of 851080469940 is 49964080158.

851080469940 is a `hidden beast` number, since 8 + 5 + 10 + 80 + 469 + 94 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61161246864 + 789919223076 = 247308^2 + 888774^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5045247 + ... + 5211206.

It is an arithmetic number, because the mean of its divisors is an integer number (35933486589).

Almost surely, 2^851080469940 is an apocalyptic number.

It is an amenable number.

851080469940 is an abundant number, since it is smaller than the sum of its proper divisors (1736130564468).

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

851080469940 is a wasteful number, since it uses less digits than its factorization.

851080469940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10256929 (or 10256924 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 851080469940 in words is "eight hundred fifty-one billion, eighty million, four hundred sixty-nine thousand, nine hundred forty".