1164889790509 has 2 divisors, whose sum is σ = 1164889790510. Its totient is φ = 1164889790508.

The previous prime is 1164889790483. The next prime is 1164889790549. The reversal of 1164889790509 is 9050979884611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114601728009 + 50288062500 = 1055747^2 + 224250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1164889790509 - 2²¹ = 1164887693357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1164889790549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582444895254 + 582444895255.

It is an arithmetic number, because the mean of its divisors is an integer number (582444895255).

Almost surely, 2^{1164889790509} is an apocalyptic number.

It is an amenable number.

1164889790509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1164889790509 is an equidigital number, since it uses as much as digits as its factorization.

1164889790509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 67.

The spelling of 1164889790509 in words is "one trillion, one hundred sixty-four billion, eight hundred eighty-nine million, seven hundred ninety thousand, five hundred nine".