4777947641 has 2 divisors, whose sum is σ = 4777947642. Its totient is φ = 4777947640.

The previous prime is 4777947611. The next prime is 4777947649. The reversal of 4777947641 is 1467497774.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2597431225 + 2180516416 = 50965^2 + 46696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4777947641 is a prime.

It is not a weakly prime, because it can be changed into another prime (4777947649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2388973820 + 2388973821.

It is an arithmetic number, because the mean of its divisors is an integer number (2388973821).

Almost surely, 2^4777947641 is an apocalyptic number.

It is an amenable number.

4777947641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4777947641 is an equidigital number, since it uses as much as digits as its factorization.

4777947641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8297856, while the sum is 56.

The square root of 4777947641 is about 69122.6998966331. The cubic root of 4777947641 is about 1684.2780755120.

The spelling of 4777947641 in words is "four billion, seven hundred seventy-seven million, nine hundred forty-seven thousand, six hundred forty-one".