86611086940649 has 4 divisors (see below), whose sum is σ = 86766582608964. Its totient is φ = 86455591272336.

The previous prime is 86611086940639. The next prime is 86611086940691. The reversal of 86611086940649 is 94604968011668.

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 9599369941225 + 77011716999424 = 3098285^2 + 8775632^2 .

It is a cyclic number.

It is not a de Polignac number, because 86611086940649 - 2²⁸ = 86610818505193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86611086940639) 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, 77747833322 + ... + 77747834435.

It is an arithmetic number, because the mean of its divisors is an integer number (21691645652241).

Almost surely, 2^{86611086940649} is an apocalyptic number.

It is an amenable number.

86611086940649 is a deficient number, since it is larger than the sum of its proper divisors (155495668315).

86611086940649 is a wasteful number, since it uses less digits than its factorization.

86611086940649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155495668314.

The product of its (nonzero) digits is 107495424, while the sum is 68.

The spelling of 86611086940649 in words is "eighty-six trillion, six hundred eleven billion, eighty-six million, nine hundred forty thousand, six hundred forty-nine".