844846125385 has 16 divisors (see below), whose sum is σ = 1073900385936. Its totient is φ = 635853457408.

The previous prime is 844846125379. The next prime is 844846125391. The reversal of 844846125385 is 583521648448.

It is an interprime number because it is at equal distance from previous prime (844846125379) and next prime (844846125391).

It can be written as a sum of positive squares in 8 ways, for example, as 1382054976 + 843464070409 = 37176^2 + 918403^2 .

It is a cyclic number.

It is not a de Polignac number, because 844846125385 - 2⁵ = 844846125353 is a prime.

It is a Duffinian number.

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, 1873354 + ... + 2280163.

It is an arithmetic number, because the mean of its divisors is an integer number (67118774121).

Almost surely, 2^844846125385 is an apocalyptic number.

844846125385 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

844846125385 is a deficient number, since it is larger than the sum of its proper divisors (229054260551).

844846125385 is a wasteful number, since it uses less digits than its factorization.

844846125385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155932.

The product of its digits is 29491200, while the sum is 58.

The spelling of 844846125385 in words is "eight hundred forty-four billion, eight hundred forty-six million, one hundred twenty-five thousand, three hundred eighty-five".