85861531199 has 2 divisors, whose sum is σ = 85861531200. Its totient is φ = 85861531198.

The previous prime is 85861531193. The next prime is 85861531201. The reversal of 85861531199 is 99113516858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85861531199 - 2³⁶ = 17142054463 is a prime.

Together with 85861531201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85861531193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42930765599 + 42930765600.

It is an arithmetic number, because the mean of its divisors is an integer number (42930765600).

Almost surely, 2^85861531199 is an apocalyptic number.

85861531199 is a deficient number, since it is larger than the sum of its proper divisors (1).

85861531199 is an equidigital number, since it uses as much as digits as its factorization.

85861531199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 56.

The spelling of 85861531199 in words is "eighty-five billion, eight hundred sixty-one million, five hundred thirty-one thousand, one hundred ninety-nine".