985715665 has 32 divisors (see below), whose sum is σ = 1311178752. Its totient is φ = 705432000.

The previous prime is 985715593. The next prime is 985715671. The reversal of 985715665 is 566517589.

985715665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 985715665 - 2²¹ = 983618513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1081560 + ... + 1082470.

It is an arithmetic number, because the mean of its divisors is an integer number (40974336).

Almost surely, 2^985715665 is an apocalyptic number.

It is an amenable number.

985715665 is a deficient number, since it is larger than the sum of its proper divisors (325463087).

985715665 is a wasteful number, since it uses less digits than its factorization.

985715665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221.

The product of its digits is 2268000, while the sum is 52.

The square root of 985715665 is about 31396.1090742149. The cubic root of 985715665 is about 995.2157019960.

The spelling of 985715665 in words is "nine hundred eighty-five million, seven hundred fifteen thousand, six hundred sixty-five".