851987141646 has 32 divisors (see below), whose sum is σ = 1778866403328. Its totient is φ = 271524892320.

The previous prime is 851987141641. The next prime is 851987141647. The reversal of 851987141646 is 646141789158.

It is a self number, because there is not a number n which added to its sum of digits gives 851987141646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851987141641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1094125 + ... + 1703256.

It is an arithmetic number, because the mean of its divisors is an integer number (55589575104).

Almost surely, 2^851987141646 is an apocalyptic number.

851987141646 is an abundant number, since it is smaller than the sum of its proper divisors (926879261682).

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

851987141646 is a wasteful number, since it uses less digits than its factorization.

851987141646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799616.

The product of its digits is 11612160, while the sum is 60.

The spelling of 851987141646 in words is "eight hundred fifty-one billion, nine hundred eighty-seven million, one hundred forty-one thousand, six hundred forty-six".