85615539 has 16 divisors (see below), whose sum is σ = 121689600. Its totient is φ = 53385696.

The previous prime is 85615531. The next prime is 85615567. The reversal of 85615539 is 93551658.

It is not a de Polignac number, because 85615539 - 2³ = 85615531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85615539.

It is not an unprimeable number, because it can be changed into a prime (85615531) 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, 5004 + ... + 14009.

It is an arithmetic number, because the mean of its divisors is an integer number (7605600).

Almost surely, 2^85615539 is an apocalyptic number.

85615539 is a deficient number, since it is larger than the sum of its proper divisors (36074061).

85615539 is a wasteful number, since it uses less digits than its factorization.

85615539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19114.

The product of its digits is 162000, while the sum is 42.

The square root of 85615539 is about 9252.8665288115. The cubic root of 85615539 is about 440.7417567559.

The spelling of 85615539 in words is "eighty-five million, six hundred fifteen thousand, five hundred thirty-nine".