264404253240409 has 2 divisors, whose sum is σ = 264404253240410. Its totient is φ = 264404253240408.

The previous prime is 264404253240397. The next prime is 264404253240419. The reversal of 264404253240409 is 904042352404462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143275034760025 + 121129218480384 = 11969755^2 + 11005872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264404253240409 is a prime.

It is not a weakly prime, because it can be changed into another prime (264404253240419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132202126620204 + 132202126620205.

It is an arithmetic number, because the mean of its divisors is an integer number (132202126620205).

Almost surely, 2^{264404253240409} is an apocalyptic number.

It is an amenable number.

264404253240409 is a deficient number, since it is larger than the sum of its proper divisors (1).

264404253240409 is an equidigital number, since it uses as much as digits as its factorization.

264404253240409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6635520, while the sum is 49.

The spelling of 264404253240409 in words is "two hundred sixty-four trillion, four hundred four billion, two hundred fifty-three million, two hundred forty thousand, four hundred nine".