1164397866809 has 2 divisors, whose sum is σ = 1164397866810. Its totient is φ = 1164397866808.

The previous prime is 1164397866799. The next prime is 1164397866859. The reversal of 1164397866809 is 9086687934611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1067460912400 + 96936954409 = 1033180^2 + 311347^2 .

It is a cyclic number.

It is not a de Polignac number, because 1164397866809 - 2³² = 1160102899513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1164397866859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582198933404 + 582198933405.

It is an arithmetic number, because the mean of its divisors is an integer number (582198933405).

Almost surely, 2^{1164397866809} is an apocalyptic number.

It is an amenable number.

1164397866809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1164397866809 is an equidigital number, since it uses as much as digits as its factorization.

1164397866809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94058496, while the sum is 68.

The spelling of 1164397866809 in words is "one trillion, one hundred sixty-four billion, three hundred ninety-seven million, eight hundred sixty-six thousand, eight hundred nine".