86640706619 has 2 divisors, whose sum is σ = 86640706620. Its totient is φ = 86640706618.

The previous prime is 86640706573. The next prime is 86640706631. The reversal of 86640706619 is 91660704668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86640706619 - 2²⁸ = 86372271163 is a prime.

It is a super-2 number, since 2×86640706619² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86640706219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43320353309 + 43320353310.

It is an arithmetic number, because the mean of its divisors is an integer number (43320353310).

Almost surely, 2^86640706619 is an apocalyptic number.

86640706619 is a deficient number, since it is larger than the sum of its proper divisors (1).

86640706619 is an equidigital number, since it uses as much as digits as its factorization.

86640706619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 86640706619 in words is "eighty-six billion, six hundred forty million, seven hundred six thousand, six hundred nineteen".