8845478745491 has 2 divisors, whose sum is σ = 8845478745492. Its totient is φ = 8845478745490.

The previous prime is 8845478745479. The next prime is 8845478745529. The reversal of 8845478745491 is 1945478745488.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8845478745491 - 2¹⁴ = 8845478729107 is a prime.

It is not a weakly prime, because it can be changed into another prime (8845478745421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4422739372745 + 4422739372746.

It is an arithmetic number, because the mean of its divisors is an integer number (4422739372746).

Almost surely, 2^{8845478745491} is an apocalyptic number.

8845478745491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8845478745491 is an equidigital number, since it uses as much as digits as its factorization.

8845478745491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1445068800, while the sum is 74.

The spelling of 8845478745491 in words is "eight trillion, eight hundred forty-five billion, four hundred seventy-eight million, seven hundred forty-five thousand, four hundred ninety-one".