5543421691 has 2 divisors, whose sum is σ = 5543421692. Its totient is φ = 5543421690.

The previous prime is 5543421673. The next prime is 5543421701. The reversal of 5543421691 is 1961243455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5543421691 - 2⁹ = 5543421179 is a prime.

It is not a weakly prime, because it can be changed into another prime (5543421391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2771710845 + 2771710846.

It is an arithmetic number, because the mean of its divisors is an integer number (2771710846).

Almost surely, 2^5543421691 is an apocalyptic number.

5543421691 is a deficient number, since it is larger than the sum of its proper divisors (1).

5543421691 is an equidigital number, since it uses as much as digits as its factorization.

5543421691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 5543421691 is about 74454.1583190623. The cubic root of 5543421691 is about 1769.8072599133.

The spelling of 5543421691 in words is "five billion, five hundred forty-three million, four hundred twenty-one thousand, six hundred ninety-one".