64423232449 has 2 divisors, whose sum is σ = 64423232450. Its totient is φ = 64423232448.

The previous prime is 64423232443. The next prime is 64423232477. The reversal of 64423232449 is 94423232446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63375545025 + 1047687424 = 251745^2 + 32368^2 .

It is a cyclic number.

It is not a de Polignac number, because 64423232449 - 2¹⁷ = 64423101377 is a prime.

It is not a weakly prime, because it can be changed into another prime (64423232443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32211616224 + 32211616225.

It is an arithmetic number, because the mean of its divisors is an integer number (32211616225).

Almost surely, 2^64423232449 is an apocalyptic number.

It is an amenable number.

64423232449 is a deficient number, since it is larger than the sum of its proper divisors (1).

64423232449 is an equidigital number, since it uses as much as digits as its factorization.

64423232449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 43.

The spelling of 64423232449 in words is "sixty-four billion, four hundred twenty-three million, two hundred thirty-two thousand, four hundred forty-nine".