85312816144 has 20 divisors (see below), whose sum is σ = 165301613100. Its totient is φ = 42654335360.

The previous prime is 85312816139. The next prime is 85312816187. The reversal of 85312816144 is 44161821358.

It can be written as a sum of positive squares in 2 ways, for example, as 74195222544 + 11117593600 = 272388^2 + 105440^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 85312816144.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242382 + ... + 478930.

It is an arithmetic number, because the mean of its divisors is an integer number (8265080655).

Almost surely, 2^85312816144 is an apocalyptic number.

It is an amenable number.

85312816144 is a deficient number, since it is larger than the sum of its proper divisors (79988796956).

85312816144 is a wasteful number, since it uses less digits than its factorization.

85312816144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259098 (or 259092 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The spelling of 85312816144 in words is "eighty-five billion, three hundred twelve million, eight hundred sixteen thousand, one hundred forty-four".