851258439642144 has 96 divisors (see below), whose sum is σ = 2279962608565824. Its totient is φ = 278001839897600.

The previous prime is 851258439642073. The next prime is 851258439642161. The reversal of 851258439642144 is 441246934852158.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 115767894 + ... + 122901269.

It is an arithmetic number, because the mean of its divisors is an integer number (23749610505894).

Almost surely, 2^{851258439642144} is an apocalyptic number.

It is an amenable number.

851258439642144 is an abundant number, since it is smaller than the sum of its proper divisors (1428704168923680).

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

851258439642144 is a wasteful number, since it uses less digits than its factorization.

851258439642144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238669930 (or 238669922 counting only the distinct ones).

The product of its digits is 265420800, while the sum is 66.

The spelling of 851258439642144 in words is "eight hundred fifty-one trillion, two hundred fifty-eight billion, four hundred thirty-nine million, six hundred forty-two thousand, one hundred forty-four".