85655615 has 4 divisors (see below), whose sum is σ = 102786744. Its totient is φ = 68524488.

The previous prime is 85655593. The next prime is 85655621. The reversal of 85655615 is 51655658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85655615 - 2¹² = 85651519 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 8565557 + ... + 8565566.

It is an arithmetic number, because the mean of its divisors is an integer number (25696686).

Almost surely, 2^85655615 is an apocalyptic number.

85655615 is a deficient number, since it is larger than the sum of its proper divisors (17131129).

85655615 is a wasteful number, since it uses less digits than its factorization.

85655615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17131128.

The product of its digits is 180000, while the sum is 41.

The square root of 85655615 is about 9255.0318746075. The cubic root of 85655615 is about 440.8105153464.

The spelling of 85655615 in words is "eighty-five million, six hundred fifty-five thousand, six hundred fifteen".