2164644826859 has 2 divisors, whose sum is σ = 2164644826860. Its totient is φ = 2164644826858.

The previous prime is 2164644826847. The next prime is 2164644826873. The reversal of 2164644826859 is 9586284464612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2164644826859 is a prime.

It is a super-3 number, since 3×2164644826859³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2164644826795 and 2164644826804.

It is not a weakly prime, because it can be changed into another prime (2164644828859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082322413429 + 1082322413430.

It is an arithmetic number, because the mean of its divisors is an integer number (1082322413430).

Almost surely, 2^{2164644826859} is an apocalyptic number.

2164644826859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164644826859 is an equidigital number, since it uses as much as digits as its factorization.

2164644826859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 159252480, while the sum is 65.

The spelling of 2164644826859 in words is "two trillion, one hundred sixty-four billion, six hundred forty-four million, eight hundred twenty-six thousand, eight hundred fifty-nine".