86782815187 has 2 divisors, whose sum is σ = 86782815188. Its totient is φ = 86782815186.

The previous prime is 86782815173. The next prime is 86782815289. The reversal of 86782815187 is 78151828768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86782815187 - 2²³ = 86774426579 is a prime.

It is not a weakly prime, because it can be changed into another prime (86782815137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43391407593 + 43391407594.

It is an arithmetic number, because the mean of its divisors is an integer number (43391407594).

Almost surely, 2^86782815187 is an apocalyptic number.

86782815187 is a deficient number, since it is larger than the sum of its proper divisors (1).

86782815187 is an equidigital number, since it uses as much as digits as its factorization.

86782815187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12042240, while the sum is 61.

The spelling of 86782815187 in words is "eighty-six billion, seven hundred eighty-two million, eight hundred fifteen thousand, one hundred eighty-seven".