85539890099 has 4 divisors (see below), whose sum is σ = 86017766760. Its totient is φ = 85062013440.

The previous prime is 85539890081. The next prime is 85539890179. The reversal of 85539890099 is 99009893558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85539890099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85539890069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238938062 + ... + 238938419.

It is an arithmetic number, because the mean of its divisors is an integer number (21504441690).

Almost surely, 2^85539890099 is an apocalyptic number.

85539890099 is a deficient number, since it is larger than the sum of its proper divisors (477876661).

85539890099 is a wasteful number, since it uses less digits than its factorization.

85539890099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477876660.

The product of its (nonzero) digits is 31492800, while the sum is 65.

The spelling of 85539890099 in words is "eighty-five billion, five hundred thirty-nine million, eight hundred ninety thousand, ninety-nine".