55500555449 has 2 divisors, whose sum is σ = 55500555450. Its totient is φ = 55500555448.

The previous prime is 55500555379. The next prime is 55500555491. The reversal of 55500555449 is 94455500555.

It is a happy number.

55500555449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47914145449 + 7586410000 = 218893^2 + 87100^2 .

It is a cyclic number.

It is not a de Polignac number, because 55500555449 - 2²⁰ = 55499506873 is a prime.

It is not a weakly prime, because it can be changed into another prime (55500155449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750277724 + 27750277725.

It is an arithmetic number, because the mean of its divisors is an integer number (27750277725).

Almost surely, 2^55500555449 is an apocalyptic number.

It is an amenable number.

55500555449 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500555449 is an equidigital number, since it uses as much as digits as its factorization.

55500555449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250000, while the sum is 47.

The spelling of 55500555449 in words is "fifty-five billion, five hundred million, five hundred fifty-five thousand, four hundred forty-nine".