55504591789 has 4 divisors (see below), whose sum is σ = 57418543260. Its totient is φ = 53590640320.

The previous prime is 55504591763. The next prime is 55504591913. The reversal of 55504591789 is 98719540555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46864889289 + 8639702500 = 216483^2 + 92950^2 .

It is a cyclic number.

It is not a de Polignac number, because 55504591789 - 2⁷ = 55504591661 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 (55504591489) 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, 956975692 + ... + 956975749.

It is an arithmetic number, because the mean of its divisors is an integer number (14354635815).

Almost surely, 2^55504591789 is an apocalyptic number.

It is an amenable number.

55504591789 is a deficient number, since it is larger than the sum of its proper divisors (1913951471).

55504591789 is a wasteful number, since it uses less digits than its factorization.

55504591789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913951470.

The product of its (nonzero) digits is 11340000, while the sum is 58.

The spelling of 55504591789 in words is "fifty-five billion, five hundred four million, five hundred ninety-one thousand, seven hundred eighty-nine".