4742643649 has 2 divisors, whose sum is σ = 4742643650. Its totient is φ = 4742643648.

The previous prime is 4742643641. The next prime is 4742643739. The reversal of 4742643649 is 9463462474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3018733249 + 1723910400 = 54943^2 + 41520^2 .

It is a cyclic number.

It is not a de Polignac number, because 4742643649 - 2³ = 4742643641 is a prime.

It is not a weakly prime, because it can be changed into another prime (4742643641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2371321824 + 2371321825.

It is an arithmetic number, because the mean of its divisors is an integer number (2371321825).

Almost surely, 2^4742643649 is an apocalyptic number.

It is an amenable number.

4742643649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4742643649 is an equidigital number, since it uses as much as digits as its factorization.

4742643649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 49.

The square root of 4742643649 is about 68866.8545020026. The cubic root of 4742643649 is about 1680.1194700801.

The spelling of 4742643649 in words is "four billion, seven hundred forty-two million, six hundred forty-three thousand, six hundred forty-nine".