85177618 has 4 divisors (see below), whose sum is σ = 127766430. Its totient is φ = 42588808.

The previous prime is 85177607. The next prime is 85177619. The reversal of 85177618 is 81677158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81677158 = 2 ⋅40838579.

It can be written as a sum of positive squares in only one way, i.e., 62204769 + 22972849 = 7887^2 + 4793^2 .

It is not an unprimeable number, because it can be changed into a prime (85177619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21294403 + ... + 21294406.

Almost surely, 2^85177618 is an apocalyptic number.

85177618 is a deficient number, since it is larger than the sum of its proper divisors (42588812).

85177618 is a wasteful number, since it uses less digits than its factorization.

85177618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42588811.

The product of its digits is 94080, while the sum is 43.

The square root of 85177618 is about 9229.1721188848. The cubic root of 85177618 is about 439.9890114336.

The spelling of 85177618 in words is "eighty-five million, one hundred seventy-seven thousand, six hundred eighteen".