85640808959 has 8 divisors (see below), whose sum is σ = 89392178400. Its totient is φ = 81891760896.

The previous prime is 85640808941. The next prime is 85640808973. The reversal of 85640808959 is 95980804658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85640808959 - 2¹² = 85640804863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85640808989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504734 + ... + 652715.

It is an arithmetic number, because the mean of its divisors is an integer number (11174022300).

Almost surely, 2^85640808959 is an apocalyptic number.

85640808959 is a deficient number, since it is larger than the sum of its proper divisors (3751369441).

85640808959 is a wasteful number, since it uses less digits than its factorization.

85640808959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160689.

The product of its (nonzero) digits is 24883200, while the sum is 62.

The spelling of 85640808959 in words is "eighty-five billion, six hundred forty million, eight hundred eight thousand, nine hundred fifty-nine".