86571868243 has 4 divisors (see below), whose sum is σ = 98939278000. Its totient is φ = 74204458488.

The previous prime is 86571868237. The next prime is 86571868247. The reversal of 86571868243 is 34286817568.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86571868243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86571868247) 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, 6183704868 + ... + 6183704881.

It is an arithmetic number, because the mean of its divisors is an integer number (24734819500).

Almost surely, 2^86571868243 is an apocalyptic number.

86571868243 is a deficient number, since it is larger than the sum of its proper divisors (12367409757).

86571868243 is a wasteful number, since it uses less digits than its factorization.

86571868243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12367409756.

The product of its digits is 15482880, while the sum is 58.

It can be divided in two parts, 8657 and 1868243, that added together give a square (1876900 = 1370²).

The spelling of 86571868243 in words is "eighty-six billion, five hundred seventy-one million, eight hundred sixty-eight thousand, two hundred forty-three".