4791844781 has 2 divisors, whose sum is σ = 4791844782. Its totient is φ = 4791844780.

The previous prime is 4791844711. The next prime is 4791844787. The reversal of 4791844781 is 1874481974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4715019556 + 76825225 = 68666^2 + 8765^2 .

It is a cyclic number.

It is not a de Polignac number, because 4791844781 - 2¹⁸ = 4791582637 is a prime.

It is a super-2 number, since 2×4791844781² = 45923552810393875922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4791844787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2395922390 + 2395922391.

It is an arithmetic number, because the mean of its divisors is an integer number (2395922391).

Almost surely, 2^4791844781 is an apocalyptic number.

It is an amenable number.

4791844781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4791844781 is an equidigital number, since it uses as much as digits as its factorization.

4791844781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 53.

The square root of 4791844781 is about 69223.1520591196. The cubic root of 4791844781 is about 1685.9094587643.

The spelling of 4791844781 in words is "four billion, seven hundred ninety-one million, eight hundred forty-four thousand, seven hundred eighty-one".