164781223099 has 2 divisors, whose sum is σ = 164781223100. Its totient is φ = 164781223098.

The previous prime is 164781223063. The next prime is 164781223109. The reversal of 164781223099 is 990322187461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164781223099 - 2⁹ = 164781222587 is a prime.

It is a super-2 number, since 2×164781223099² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164781223039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82390611549 + 82390611550.

It is an arithmetic number, because the mean of its divisors is an integer number (82390611550).

Almost surely, 2^164781223099 is an apocalyptic number.

164781223099 is a deficient number, since it is larger than the sum of its proper divisors (1).

164781223099 is an equidigital number, since it uses as much as digits as its factorization.

164781223099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 164781223099 in words is "one hundred sixty-four billion, seven hundred eighty-one million, two hundred twenty-three thousand, ninety-nine".