85959917615 has 128 divisors (see below), whose sum is σ = 126340300800. Its totient is φ = 55324684800.

The previous prime is 85959917609. The next prime is 85959917633. The reversal of 85959917615 is 51671995958.

It is a happy number.

It is not a de Polignac number, because 85959917615 - 2¹² = 85959913519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 431959286 + ... + 431959484.

It is an arithmetic number, because the mean of its divisors is an integer number (987033600).

Almost surely, 2^85959917615 is an apocalyptic number.

85959917615 is a deficient number, since it is larger than the sum of its proper divisors (40380383185).

85959917615 is a wasteful number, since it uses less digits than its factorization.

85959917615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493.

The product of its digits is 30618000, while the sum is 65.

The spelling of 85959917615 in words is "eighty-five billion, nine hundred fifty-nine million, nine hundred seventeen thousand, six hundred fifteen".