85864920031 has 4 divisors (see below), whose sum is σ = 93670821864. Its totient is φ = 78059018200.

The previous prime is 85864920007. The next prime is 85864920059. The reversal of 85864920031 is 13002946858.

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

It is a cyclic number.

It is not a de Polignac number, because 85864920031 - 2²⁷ = 85730702303 is a prime.

It is a super-2 number, since 2×85864920031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85864920331) 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, 3902950900 + ... + 3902950921.

It is an arithmetic number, because the mean of its divisors is an integer number (23417705466).

Almost surely, 2^85864920031 is an apocalyptic number.

85864920031 is a deficient number, since it is larger than the sum of its proper divisors (7805901833).

85864920031 is a wasteful number, since it uses less digits than its factorization.

85864920031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7805901832.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 85864920031 in words is "eighty-five billion, eight hundred sixty-four million, nine hundred twenty thousand, thirty-one".