264336643 has 2 divisors, whose sum is σ = 264336644. Its totient is φ = 264336642.

The previous prime is 264336617. The next prime is 264336673. The reversal of 264336643 is 346633462.

264336643 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264336643 is a prime.

It is not a weakly prime, because it can be changed into another prime (264336613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132168321 + 132168322.

It is an arithmetic number, because the mean of its divisors is an integer number (132168322).

Almost surely, 2^264336643 is an apocalyptic number.

264336643 is a deficient number, since it is larger than the sum of its proper divisors (1).

264336643 is an equidigital number, since it uses as much as digits as its factorization.

264336643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 37.

The square root of 264336643 is about 16258.4329810717. The cubic root of 264336643 is about 641.7794254268.

The spelling of 264336643 in words is "two hundred sixty-four million, three hundred thirty-six thousand, six hundred forty-three".