55241505691 has 2 divisors, whose sum is σ = 55241505692. Its totient is φ = 55241505690.

The previous prime is 55241505689. The next prime is 55241505721. The reversal of 55241505691 is 19650514255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55241505691 - 2¹ = 55241505689 is a prime.

Together with 55241505689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55241505191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27620752845 + 27620752846.

It is an arithmetic number, because the mean of its divisors is an integer number (27620752846).

Almost surely, 2^55241505691 is an apocalyptic number.

55241505691 is a deficient number, since it is larger than the sum of its proper divisors (1).

55241505691 is an equidigital number, since it uses as much as digits as its factorization.

55241505691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 55241505691 in words is "fifty-five billion, two hundred forty-one million, five hundred five thousand, six hundred ninety-one".