86178911387 has 2 divisors, whose sum is σ = 86178911388. Its totient is φ = 86178911386.

The previous prime is 86178911381. The next prime is 86178911411. The reversal of 86178911387 is 78311987168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86178911387 - 2⁶ = 86178911323 is a prime.

It is not a weakly prime, because it can be changed into another prime (86178911381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43089455693 + 43089455694.

It is an arithmetic number, because the mean of its divisors is an integer number (43089455694).

Almost surely, 2^86178911387 is an apocalyptic number.

86178911387 is a deficient number, since it is larger than the sum of its proper divisors (1).

86178911387 is an equidigital number, since it uses as much as digits as its factorization.

86178911387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 59.

The spelling of 86178911387 in words is "eighty-six billion, one hundred seventy-eight million, nine hundred eleven thousand, three hundred eighty-seven".