85981611 has 8 divisors (see below), whose sum is σ = 115479504. Its totient is φ = 56902400.

The previous prime is 85981601. The next prime is 85981661. The reversal of 85981611 is 11618958.

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 85981611 - 2⁵ = 85981579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85981611.

It is not an unprimeable number, because it can be changed into a prime (85981601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104190 + ... + 105011.

It is an arithmetic number, because the mean of its divisors is an integer number (14434938).

Almost surely, 2^85981611 is an apocalyptic number.

85981611 is a deficient number, since it is larger than the sum of its proper divisors (29497893).

85981611 is a wasteful number, since it uses less digits than its factorization.

85981611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209341.

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

The square root of 85981611 is about 9272.6269740565. The cubic root of 85981611 is about 441.3690330956.

The spelling of 85981611 in words is "eighty-five million, nine hundred eighty-one thousand, six hundred eleven".