86138717761 has 4 divisors (see below), whose sum is σ = 88466791252. Its totient is φ = 83810644272.

The previous prime is 86138717713. The next prime is 86138717779. The reversal of 86138717761 is 16771783168.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82042717761 + 4096000000 = 286431^2 + 64000^2 .

It is a cyclic number.

It is not a de Polignac number, because 86138717761 - 2¹⁵ = 86138684993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86138217761) 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, 1164036690 + ... + 1164036763.

It is an arithmetic number, because the mean of its divisors is an integer number (22116697813).

Almost surely, 2^86138717761 is an apocalyptic number.

It is an amenable number.

86138717761 is a deficient number, since it is larger than the sum of its proper divisors (2328073491).

86138717761 is a wasteful number, since it uses less digits than its factorization.

86138717761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328073490.

The product of its digits is 2370816, while the sum is 55.

The spelling of 86138717761 in words is "eighty-six billion, one hundred thirty-eight million, seven hundred seventeen thousand, seven hundred sixty-one".