86738918591 has 6 divisors (see below), whose sum is σ = 93924391320. Its totient is φ = 80066693928.

The previous prime is 86738918543. The next prime is 86738918611. The reversal of 86738918591 is 19581983768.

It is not a de Polignac number, because 86738918591 - 2¹⁸ = 86738656447 is a prime.

It is a super-2 number, since 2×86738918591² (a number of 23 digits) contains 22 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 (86738918501) 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 5 ways as a sum of consecutive naturals, for example, 256623851 + ... + 256624188.

It is an arithmetic number, because the mean of its divisors is an integer number (15654065220).

Almost surely, 2^86738918591 is an apocalyptic number.

86738918591 is a deficient number, since it is larger than the sum of its proper divisors (7185472729).

86738918591 is a wasteful number, since it uses less digits than its factorization.

86738918591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513248065 (or 513248052 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 65.

The spelling of 86738918591 in words is "eighty-six billion, seven hundred thirty-eight million, nine hundred eighteen thousand, five hundred ninety-one".