86177538217 has 2 divisors, whose sum is σ = 86177538218. Its totient is φ = 86177538216.

The previous prime is 86177538151. The next prime is 86177538229. The reversal of 86177538217 is 71283577168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85397788441 + 779749776 = 292229^2 + 27924^2 .

It is a cyclic number.

It is not a de Polignac number, because 86177538217 - 2¹¹ = 86177536169 is a prime.

It is not a weakly prime, because it can be changed into another prime (86177538277) 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 as a sum of consecutive naturals, namely, 43088769108 + 43088769109.

It is an arithmetic number, because the mean of its divisors is an integer number (43088769109).

Almost surely, 2^86177538217 is an apocalyptic number.

It is an amenable number.

86177538217 is a deficient number, since it is larger than the sum of its proper divisors (1).

86177538217 is an equidigital number, since it uses as much as digits as its factorization.

86177538217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3951360, while the sum is 55.

The spelling of 86177538217 in words is "eighty-six billion, one hundred seventy-seven million, five hundred thirty-eight thousand, two hundred seventeen".