86726788691 has 2 divisors, whose sum is σ = 86726788692. Its totient is φ = 86726788690.

The previous prime is 86726788669. The next prime is 86726788693. The reversal of 86726788691 is 19688762768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86726788691 - 2³⁰ = 85653046867 is a prime.

Together with 86726788693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86726788693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43363394345 + 43363394346.

It is an arithmetic number, because the mean of its divisors is an integer number (43363394346).

Almost surely, 2^86726788691 is an apocalyptic number.

86726788691 is a deficient number, since it is larger than the sum of its proper divisors (1).

86726788691 is an equidigital number, since it uses as much as digits as its factorization.

86726788691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97542144, while the sum is 68.

The spelling of 86726788691 in words is "eighty-six billion, seven hundred twenty-six million, seven hundred eighty-eight thousand, six hundred ninety-one".