86939218081 has 4 divisors (see below), whose sum is σ = 86942545200. Its totient is φ = 86935890964.

The previous prime is 86939218057. The next prime is 86939218111. The reversal of 86939218081 is 18081293968.

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 86939218081 - 2¹⁷ = 86939087009 is a prime.

It is a super-2 number, since 2×86939218081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86939218981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1624051 + ... + 1676728.

It is an arithmetic number, because the mean of its divisors is an integer number (21735636300).

Almost surely, 2^86939218081 is an apocalyptic number.

It is an amenable number.

86939218081 is a deficient number, since it is larger than the sum of its proper divisors (3327119).

86939218081 is a wasteful number, since it uses less digits than its factorization.

86939218081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327118.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 86939218081 in words is "eighty-six billion, nine hundred thirty-nine million, two hundred eighteen thousand, eighty-one".