78617085 has 16 divisors (see below), whose sum is σ = 129845760. Its totient is φ = 40576320.

The previous prime is 78617083. The next prime is 78617113. The reversal of 78617085 is 58071687.

It is not a de Polignac number, because 78617085 - 2¹ = 78617083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78617081) 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, 84070 + ... + 84999.

It is an arithmetic number, because the mean of its divisors is an integer number (8115360).

Almost surely, 2^78617085 is an apocalyptic number.

It is an amenable number.

78617085 is a deficient number, since it is larger than the sum of its proper divisors (51228675).

78617085 is a wasteful number, since it uses less digits than its factorization.

78617085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169108.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 78617085 is about 8866.6276001646. The cubic root of 78617085 is about 428.3896591872.

It can be divided in two parts, 786 and 17085, that added together give a palindrome (17871).

The spelling of 78617085 in words is "seventy-eight million, six hundred seventeen thousand, eighty-five".