8204978597749 has 2 divisors, whose sum is σ = 8204978597750. Its totient is φ = 8204978597748.

The previous prime is 8204978597731. The next prime is 8204978597771. The reversal of 8204978597749 is 9477958794028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4113331578225 + 4091647019524 = 2028135^2 + 2022782^2 .

It is a cyclic number.

It is not a de Polignac number, because 8204978597749 - 2²³ = 8204970209141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8204978597779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4102489298874 + 4102489298875.

It is an arithmetic number, because the mean of its divisors is an integer number (4102489298875).

Almost surely, 2^{8204978597749} is an apocalyptic number.

It is an amenable number.

8204978597749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8204978597749 is an equidigital number, since it uses as much as digits as its factorization.

8204978597749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560481280, while the sum is 79.

The spelling of 8204978597749 in words is "eight trillion, two hundred four billion, nine hundred seventy-eight million, five hundred ninety-seven thousand, seven hundred forty-nine".