1091711255443 has 2 divisors, whose sum is σ = 1091711255444. Its totient is φ = 1091711255442.

The previous prime is 1091711255429. The next prime is 1091711255461. The reversal of 1091711255443 is 3445521171901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1091711255443 - 2³⁷ = 954272301971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1091711255443.

It is not a weakly prime, because it can be changed into another prime (1091711295443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545855627721 + 545855627722.

It is an arithmetic number, because the mean of its divisors is an integer number (545855627722).

Almost surely, 2^{1091711255443} is an apocalyptic number.

1091711255443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091711255443 is an equidigital number, since it uses as much as digits as its factorization.

1091711255443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 1091711255443 in words is "one trillion, ninety-one billion, seven hundred eleven million, two hundred fifty-five thousand, four hundred forty-three".