85901611999 has 16 divisors (see below), whose sum is σ = 99261160960. Its totient is φ = 72815980320.

The previous prime is 85901611969. The next prime is 85901612021. The reversal of 85901611999 is 99911610958.

It is a cyclic number.

It is not a de Polignac number, because 85901611999 - 2⁷ = 85901611871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85901611969) 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, 452209 + ... + 613429.

It is an arithmetic number, because the mean of its divisors is an integer number (6203822560).

Almost surely, 2^85901611999 is an apocalyptic number.

85901611999 is a deficient number, since it is larger than the sum of its proper divisors (13359548961).

85901611999 is a wasteful number, since it uses less digits than its factorization.

85901611999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162070.

The product of its (nonzero) digits is 1574640, while the sum is 58.

The spelling of 85901611999 in words is "eighty-five billion, nine hundred one million, six hundred eleven thousand, nine hundred ninety-nine".