164645563 has 2 divisors, whose sum is σ = 164645564. Its totient is φ = 164645562.

The previous prime is 164645539. The next prime is 164645573. The reversal of 164645563 is 365546461.

164645563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164645563 is a prime.

It is a super-2 number, since 2×164645563² = 54216322831173938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164645573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82322781 + 82322782.

It is an arithmetic number, because the mean of its divisors is an integer number (82322782).

Almost surely, 2^164645563 is an apocalyptic number.

164645563 is a deficient number, since it is larger than the sum of its proper divisors (1).

164645563 is an equidigital number, since it uses as much as digits as its factorization.

164645563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 40.

The square root of 164645563 is about 12831.4287201387. The cubic root of 164645563 is about 548.0876427125.

The spelling of 164645563 in words is "one hundred sixty-four million, six hundred forty-five thousand, five hundred sixty-three".