8452778749 has 2 divisors, whose sum is σ = 8452778750. Its totient is φ = 8452778748.

The previous prime is 8452778713. The next prime is 8452778801. The reversal of 8452778749 is 9478772548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7048777849 + 1404000900 = 83957^2 + 37470^2 .

It is a cyclic number.

It is not a de Polignac number, because 8452778749 - 2²⁷ = 8318561021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8452728749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4226389374 + 4226389375.

It is an arithmetic number, because the mean of its divisors is an integer number (4226389375).

Almost surely, 2^8452778749 is an apocalyptic number.

It is an amenable number.

8452778749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8452778749 is an equidigital number, since it uses as much as digits as its factorization.

8452778749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31610880, while the sum is 61.

The square root of 8452778749 is about 91938.9947138862. The cubic root of 8452778749 is about 2037.0412982936.

The spelling of 8452778749 in words is "eight billion, four hundred fifty-two million, seven hundred seventy-eight thousand, seven hundred forty-nine".