851387612 has 24 divisors (see below), whose sum is σ = 1551177936. Its totient is φ = 408509568.

The previous prime is 851387609. The next prime is 851387623. The reversal of 851387612 is 216783158.

It is a self number, because there is not a number n which added to its sum of digits gives 851387612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28598 + ... + 50205.

It is an arithmetic number, because the mean of its divisors is an integer number (64632414).

Almost surely, 2^851387612 is an apocalyptic number.

It is an amenable number.

851387612 is a deficient number, since it is larger than the sum of its proper divisors (699790324).

851387612 is a wasteful number, since it uses less digits than its factorization.

851387612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78917 (or 78915 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 851387612 is about 29178.5471194163. The cubic root of 851387612 is about 947.7834239126.

The spelling of 851387612 in words is "eight hundred fifty-one million, three hundred eighty-seven thousand, six hundred twelve".