11043971405897 has 2 divisors, whose sum is σ = 11043971405898. Its totient is φ = 11043971405896.

The previous prime is 11043971405849. The next prime is 11043971405981. The reversal of 11043971405897 is 79850417934011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7446409473721 + 3597561932176 = 2728811^2 + 1896724^2 .

It is a cyclic number.

It is not a de Polignac number, because 11043971405897 - 2¹⁴ = 11043971389513 is a prime.

It is not a weakly prime, because it can be changed into another prime (11043971405807) 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, 5521985702948 + 5521985702949.

It is an arithmetic number, because the mean of its divisors is an integer number (5521985702949).

Almost surely, 2^{11043971405897} is an apocalyptic number.

It is an amenable number.

11043971405897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11043971405897 is an equidigital number, since it uses as much as digits as its factorization.

11043971405897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 11043971405897 in words is "eleven trillion, forty-three billion, nine hundred seventy-one million, four hundred five thousand, eight hundred ninety-seven".