55589786909 has 4 divisors (see below), whose sum is σ = 55590267516. Its totient is φ = 55589306304.

The previous prime is 55589786899. The next prime is 55589786929. The reversal of 55589786909 is 90968798555.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21331478809 + 34258308100 = 146053^2 + 185090^2 .

It is a cyclic number.

It is not a de Polignac number, because 55589786909 - 2¹² = 55589782813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55589786929) 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, 50507 + ... + 337239.

It is an arithmetic number, because the mean of its divisors is an integer number (13897566879).

Almost surely, 2^55589786909 is an apocalyptic number.

It is an amenable number.

55589786909 is a deficient number, since it is larger than the sum of its proper divisors (480607).

55589786909 is a wasteful number, since it uses less digits than its factorization.

55589786909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480606.

The product of its (nonzero) digits is 244944000, while the sum is 71.

The spelling of 55589786909 in words is "fifty-five billion, five hundred eighty-nine million, seven hundred eighty-six thousand, nine hundred nine".