55445449499549 has 2 divisors, whose sum is σ = 55445449499550. Its totient is φ = 55445449499548.

The previous prime is 55445449499519. The next prime is 55445449499597. The reversal of 55445449499549 is 94599494454455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33761991597049 + 21683457902500 = 5810507^2 + 4656550^2 .

It is a cyclic number.

It is not a de Polignac number, because 55445449499549 - 2²⁴ = 55445432722333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55445449499519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722724749774 + 27722724749775.

It is an arithmetic number, because the mean of its divisors is an integer number (27722724749775).

Almost surely, 2^{55445449499549} is an apocalyptic number.

It is an amenable number.

55445449499549 is a deficient number, since it is larger than the sum of its proper divisors (1).

55445449499549 is an equidigital number, since it uses as much as digits as its factorization.

55445449499549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160000, while the sum is 80.

The spelling of 55445449499549 in words is "fifty-five trillion, four hundred forty-five billion, four hundred forty-nine million, four hundred ninety-nine thousand, five hundred forty-nine".