43445454491 has 2 divisors, whose sum is σ = 43445454492. Its totient is φ = 43445454490.

The previous prime is 43445454413. The next prime is 43445454551. The reversal of 43445454491 is 19445454434.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43445454491 is a prime.

It is not a weakly prime, because it can be changed into another prime (43445454191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21722727245 + 21722727246.

It is an arithmetic number, because the mean of its divisors is an integer number (21722727246).

Almost surely, 2^43445454491 is an apocalyptic number.

43445454491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43445454491 is an equidigital number, since it uses as much as digits as its factorization.

43445454491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2764800, while the sum is 47.

The spelling of 43445454491 in words is "forty-three billion, four hundred forty-five million, four hundred fifty-four thousand, four hundred ninety-one".