86249881891871 has 2 divisors, whose sum is σ = 86249881891872. Its totient is φ = 86249881891870.

The previous prime is 86249881891813. The next prime is 86249881891913. The reversal of 86249881891871 is 17819818894268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86249881891871 - 2¹⁸ = 86249881629727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86249881891571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43124940945935 + 43124940945936.

It is an arithmetic number, because the mean of its divisors is an integer number (43124940945936).

Almost surely, 2^{86249881891871} is an apocalyptic number.

86249881891871 is a deficient number, since it is larger than the sum of its proper divisors (1).

86249881891871 is an equidigital number, since it uses as much as digits as its factorization.

86249881891871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 891813888, while the sum is 80.

The spelling of 86249881891871 in words is "eighty-six trillion, two hundred forty-nine billion, eight hundred eighty-one million, eight hundred ninety-one thousand, eight hundred seventy-one".