85611819 has 8 divisors (see below), whose sum is σ = 119112192. Its totient is φ = 54593000.

The previous prime is 85611811. The next prime is 85611899. The reversal of 85611819 is 91811658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85611819 - 2³ = 85611811 is a prime.

It is a super-2 number, since 2×85611819² = 14658767104977522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85611811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620307 + ... + 620444.

It is an arithmetic number, because the mean of its divisors is an integer number (14889024).

Almost surely, 2^85611819 is an apocalyptic number.

85611819 is a deficient number, since it is larger than the sum of its proper divisors (33500373).

85611819 is a wasteful number, since it uses less digits than its factorization.

85611819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240777.

The product of its digits is 17280, while the sum is 39.

The square root of 85611819 is about 9252.6655078415. The cubic root of 85611819 is about 440.7353732454.

The spelling of 85611819 in words is "eighty-five million, six hundred eleven thousand, eight hundred nineteen".