164640653 has 2 divisors, whose sum is σ = 164640654. Its totient is φ = 164640652.

The previous prime is 164640649. The next prime is 164640683. The reversal of 164640653 is 356046461.

164640653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163379524 + 1261129 = 12782^2 + 1123^2 .

It is a cyclic number.

It is not a de Polignac number, because 164640653 - 2² = 164640649 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164640613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82320326 + 82320327.

It is an arithmetic number, because the mean of its divisors is an integer number (82320327).

Almost surely, 2^164640653 is an apocalyptic number.

It is an amenable number.

164640653 is a deficient number, since it is larger than the sum of its proper divisors (1).

164640653 is an equidigital number, since it uses as much as digits as its factorization.

164640653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 164640653 is about 12831.2373916158. The cubic root of 164640653 is about 548.0821943683.

The spelling of 164640653 in words is "one hundred sixty-four million, six hundred forty thousand, six hundred fifty-three".