86442639599 has 4 divisors (see below), whose sum is σ = 86461655064. Its totient is φ = 86423624136.

The previous prime is 86442639593. The next prime is 86442639631. The reversal of 86442639599 is 99593624468.

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-86442639599 is a prime.

It is a super-3 number, since 3×86442639599³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86442639593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9500912 + ... + 9510005.

It is an arithmetic number, because the mean of its divisors is an integer number (21615413766).

Almost surely, 2^86442639599 is an apocalyptic number.

86442639599 is a deficient number, since it is larger than the sum of its proper divisors (19015465).

86442639599 is a wasteful number, since it uses less digits than its factorization.

86442639599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19015464.

The product of its digits is 100776960, while the sum is 65.

The spelling of 86442639599 in words is "eighty-six billion, four hundred forty-two million, six hundred thirty-nine thousand, five hundred ninety-nine".