55423243672549 has 4 divisors (see below), whose sum is σ = 58340256497440. Its totient is φ = 52506230847660.

The previous prime is 55423243672523. The next prime is 55423243672571. The reversal of 55423243672549 is 94527634232455.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55423243672549 - 2³¹ = 55421096188901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55423243672579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1458506412417 + ... + 1458506412454.

It is an arithmetic number, because the mean of its divisors is an integer number (14585064124360).

Almost surely, 2^{55423243672549} is an apocalyptic number.

It is an amenable number.

55423243672549 is a deficient number, since it is larger than the sum of its proper divisors (2917012824891).

55423243672549 is a wasteful number, since it uses less digits than its factorization.

55423243672549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917012824890.

The product of its digits is 217728000, while the sum is 61.

The spelling of 55423243672549 in words is "fifty-five trillion, four hundred twenty-three billion, two hundred forty-three million, six hundred seventy-two thousand, five hundred forty-nine".