55491838589 has 4 divisors (see below), whose sum is σ = 60536551200. Its totient is φ = 50447125980.

The previous prime is 55491838553. The next prime is 55491838621. The reversal of 55491838589 is 98583819455.

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 55491838589 - 2²⁴ = 55475061373 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 (55491831589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2522356289 + ... + 2522356310.

It is an arithmetic number, because the mean of its divisors is an integer number (15134137800).

Almost surely, 2^55491838589 is an apocalyptic number.

It is an amenable number.

55491838589 is a deficient number, since it is larger than the sum of its proper divisors (5044712611).

55491838589 is a wasteful number, since it uses less digits than its factorization.

55491838589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044712610.

The product of its digits is 62208000, while the sum is 65.

The spelling of 55491838589 in words is "fifty-five billion, four hundred ninety-one million, eight hundred thirty-eight thousand, five hundred eighty-nine".