85647743999 has 4 divisors (see below), whose sum is σ = 86025047064. Its totient is φ = 85270440936.

The previous prime is 85647743959. The next prime is 85647744031. The reversal of 85647743999 is 99934774658.

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 85647743999 - 2³⁶ = 16928267263 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 (85647743959) 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, 188651192 + ... + 188651645.

It is an arithmetic number, because the mean of its divisors is an integer number (21506261766).

Almost surely, 2^85647743999 is an apocalyptic number.

85647743999 is a deficient number, since it is larger than the sum of its proper divisors (377303065).

85647743999 is a wasteful number, since it uses less digits than its factorization.

85647743999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377303064.

The product of its digits is 411505920, while the sum is 71.

The spelling of 85647743999 in words is "eighty-five billion, six hundred forty-seven million, seven hundred forty-three thousand, nine hundred ninety-nine".