86177538289 has 2 divisors, whose sum is σ = 86177538290. Its totient is φ = 86177538288.

The previous prime is 86177538277. The next prime is 86177538299. The reversal of 86177538289 is 98283577168.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84762499600 + 1415038689 = 291140^2 + 37617^2 .

It is a cyclic number.

It is not a de Polignac number, because 86177538289 - 2¹¹ = 86177536241 is a prime.

It is a super-2 number, since 2×86177538289² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86177538289.

It is not a weakly prime, because it can be changed into another prime (86177538229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43088769144 + 43088769145.

It is an arithmetic number, because the mean of its divisors is an integer number (43088769145).

Almost surely, 2^86177538289 is an apocalyptic number.

It is an amenable number.

86177538289 is a deficient number, since it is larger than the sum of its proper divisors (1).

86177538289 is an equidigital number, since it uses as much as digits as its factorization.

86177538289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40642560, while the sum is 64.

The spelling of 86177538289 in words is "eighty-six billion, one hundred seventy-seven million, five hundred thirty-eight thousand, two hundred eighty-nine".