85644737883 has 12 divisors (see below), whose sum is σ = 128290883448. Its totient is φ = 57096491760.

The previous prime is 85644737837. The next prime is 85644737909. The reversal of 85644737883 is 38873744658.

85644737883 is a `hidden beast` number, since 85 + 6 + 4 + 473 + 7 + 8 + 83 = 666.

It is not a de Polignac number, because 85644737883 - 2²⁵ = 85611183451 is a prime.

It is a super-2 number, since 2×85644737883² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85644737883.

It is not an unprimeable number, because it can be changed into a prime (85644737803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176223498 + ... + 176223983.

It is an arithmetic number, because the mean of its divisors is an integer number (10690906954).

Almost surely, 2^85644737883 is an apocalyptic number.

85644737883 is a deficient number, since it is larger than the sum of its proper divisors (42646145565).

85644737883 is an equidigital number, since it uses as much as digits as its factorization.

85644737883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352447496 (or 352447484 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 63.

The spelling of 85644737883 in words is "eighty-five billion, six hundred forty-four million, seven hundred thirty-seven thousand, eight hundred eighty-three".