55505506055489 has 4 divisors (see below), whose sum is σ = 63434864063424. Its totient is φ = 47576148047556.

The previous prime is 55505506055459. The next prime is 55505506055491. The reversal of 55505506055489 is 98455060550555.

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 55505506055489 - 2¹⁶ = 55505505989953 is a prime.

It is a super-2 number, since 2×55505506055489² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55505506055459) 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, 3964679003957 + ... + 3964679003970.

It is an arithmetic number, because the mean of its divisors is an integer number (15858716015856).

Almost surely, 2^{55505506055489} is an apocalyptic number.

It is an amenable number.

55505506055489 is a deficient number, since it is larger than the sum of its proper divisors (7929358007935).

55505506055489 is an equidigital number, since it uses as much as digits as its factorization.

55505506055489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7929358007934.

The product of its (nonzero) digits is 135000000, while the sum is 62.

The spelling of 55505506055489 in words is "fifty-five trillion, five hundred five billion, five hundred six million, fifty-five thousand, four hundred eighty-nine".