55611789 has 4 divisors (see below), whose sum is σ = 74149056. Its totient is φ = 37074524.

The previous prime is 55611779. The next prime is 55611791. The reversal of 55611789 is 98711655.

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 55611789 - 2⁵ = 55611757 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55611789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55611719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9268629 + ... + 9268634.

It is an arithmetic number, because the mean of its divisors is an integer number (18537264).

Almost surely, 2^55611789 is an apocalyptic number.

It is an amenable number.

55611789 is a deficient number, since it is larger than the sum of its proper divisors (18537267).

55611789 is a wasteful number, since it uses less digits than its factorization.

55611789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18537266.

The product of its digits is 75600, while the sum is 42.

The square root of 55611789 is about 7457.3312250429. The cubic root of 55611789 is about 381.7001132206.

The spelling of 55611789 in words is "fifty-five million, six hundred eleven thousand, seven hundred eighty-nine".