55204949689 has 4 divisors (see below), whose sum is σ = 55325748724. Its totient is φ = 55084150656.

The previous prime is 55204949671. The next prime is 55204949693. The reversal of 55204949689 is 98694940255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98694940255 = 5 ⋅19738988051.

It can be written as a sum of positive squares in 2 ways, for example, as 51435972025 + 3768977664 = 226795^2 + 61392^2 .

It is a cyclic number.

It is not a de Polignac number, because 55204949689 - 2¹¹ = 55204947641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55204940689) 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, 60398832 + ... + 60399745.

It is an arithmetic number, because the mean of its divisors is an integer number (13831437181).

Almost surely, 2^55204949689 is an apocalyptic number.

It is an amenable number.

55204949689 is a deficient number, since it is larger than the sum of its proper divisors (120799035).

55204949689 is a wasteful number, since it uses less digits than its factorization.

55204949689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120799034.

The product of its (nonzero) digits is 27993600, while the sum is 61.

The spelling of 55204949689 in words is "fifty-five billion, two hundred four million, nine hundred forty-nine thousand, six hundred eighty-nine".