86249881891909 has 4 divisors (see below), whose sum is σ = 86271890031040. Its totient is φ = 86227873752780.

The previous prime is 86249881891871. The next prime is 86249881891913. The reversal of 86249881891909 is 90919818894268.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86249881891909 - 2¹⁷ = 86249881760837 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 (86249881891939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11004063687 + ... + 11004071524.

It is an arithmetic number, because the mean of its divisors is an integer number (21567972507760).

Almost surely, 2^{86249881891909} is an apocalyptic number.

It is an amenable number.

86249881891909 is a deficient number, since it is larger than the sum of its proper divisors (22008139131).

86249881891909 is a wasteful number, since it uses less digits than its factorization.

86249881891909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22008139130.

The product of its (nonzero) digits is 1289945088, while the sum is 82.

The spelling of 86249881891909 in words is "eighty-six trillion, two hundred forty-nine billion, eight hundred eighty-one million, eight hundred ninety-one thousand, nine hundred nine".