86646243887 has 4 divisors (see below), whose sum is σ = 99024278736. Its totient is φ = 74268209040.

The previous prime is 86646243883. The next prime is 86646243899. The reversal of 86646243887 is 78834264668.

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

It is a cyclic number.

It is not a de Polignac number, because 86646243887 - 2² = 86646243883 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 (86646243883) 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, 6189017414 + ... + 6189017427.

It is an arithmetic number, because the mean of its divisors is an integer number (24756069684).

Almost surely, 2^86646243887 is an apocalyptic number.

86646243887 is a deficient number, since it is larger than the sum of its proper divisors (12378034849).

86646243887 is a wasteful number, since it uses less digits than its factorization.

86646243887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12378034848.

The product of its digits is 74317824, while the sum is 62.

The spelling of 86646243887 in words is "eighty-six billion, six hundred forty-six million, two hundred forty-three thousand, eight hundred eighty-seven".