86391667643899 has 2 divisors, whose sum is σ = 86391667643900. Its totient is φ = 86391667643898.

The previous prime is 86391667643861. The next prime is 86391667643909. The reversal of 86391667643899 is 99834676619368.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86391667643899 - 2³³ = 86383077709307 is a prime.

It is not a weakly prime, because it can be changed into another prime (86391667643819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43195833821949 + 43195833821950.

It is an arithmetic number, because the mean of its divisors is an integer number (43195833821950).

Almost surely, 2^{86391667643899} is an apocalyptic number.

86391667643899 is a deficient number, since it is larger than the sum of its proper divisors (1).

86391667643899 is an equidigital number, since it uses as much as digits as its factorization.

86391667643899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15237476352, while the sum is 85.

The spelling of 86391667643899 in words is "eighty-six trillion, three hundred ninety-one billion, six hundred sixty-seven million, six hundred forty-three thousand, eight hundred ninety-nine".