86385128639 has 4 divisors (see below), whose sum is σ = 87478611360. Its totient is φ = 85291645920.

The previous prime is 86385128633. The next prime is 86385128651. The reversal of 86385128639 is 93682158368.

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 86385128639 - 2⁸ = 86385128383 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 (86385128633) 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, 546741242 + ... + 546741399.

It is an arithmetic number, because the mean of its divisors is an integer number (21869652840).

Almost surely, 2^86385128639 is an apocalyptic number.

86385128639 is a deficient number, since it is larger than the sum of its proper divisors (1093482721).

86385128639 is a wasteful number, since it uses less digits than its factorization.

86385128639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093482720.

The product of its digits is 14929920, while the sum is 59.

The spelling of 86385128639 in words is "eighty-six billion, three hundred eighty-five million, one hundred twenty-eight thousand, six hundred thirty-nine".