90317306985 has 16 divisors (see below), whose sum is σ = 144545192064. Its totient is φ = 48156730112.

The previous prime is 90317306983. The next prime is 90317307043. The reversal of 90317306985 is 58960371309.

It is a cyclic number.

It is not a de Polignac number, because 90317306985 - 2¹ = 90317306983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90317306983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721392 + ... + 837281.

It is an arithmetic number, because the mean of its divisors is an integer number (9034074504).

Almost surely, 2^90317306985 is an apocalyptic number.

It is an amenable number.

90317306985 is a deficient number, since it is larger than the sum of its proper divisors (54227885079).

90317306985 is a wasteful number, since it uses less digits than its factorization.

90317306985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562544.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The spelling of 90317306985 in words is "ninety billion, three hundred seventeen million, three hundred six thousand, nine hundred eighty-five".