7443648649 has 2 divisors, whose sum is σ = 7443648650. Its totient is φ = 7443648648.

The previous prime is 7443648643. The next prime is 7443648673. The reversal of 7443648649 is 9468463447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5241036025 + 2202612624 = 72395^2 + 46932^2 .

It is a cyclic number.

It is not a de Polignac number, because 7443648649 - 2²⁵ = 7410094217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7443648649.

It is not a weakly prime, because it can be changed into another prime (7443648643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3721824324 + 3721824325.

It is an arithmetic number, because the mean of its divisors is an integer number (3721824325).

Almost surely, 2^7443648649 is an apocalyptic number.

It is an amenable number.

7443648649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7443648649 is an equidigital number, since it uses as much as digits as its factorization.

7443648649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 55.

The square root of 7443648649 is about 86276.5822746822. The cubic root of 7443648649 is about 1952.5190891978.

The spelling of 7443648649 in words is "seven billion, four hundred forty-three million, six hundred forty-eight thousand, six hundred forty-nine".