549431318677 has 2 divisors, whose sum is σ = 549431318678. Its totient is φ = 549431318676.

The previous prime is 549431318671. The next prime is 549431318717. The reversal of 549431318677 is 776813134945.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 461759661841 + 87671656836 = 679529^2 + 296094^2 .

It is a cyclic number.

It is not a de Polignac number, because 549431318677 - 2²⁷ = 549297100949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549431318671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274715659338 + 274715659339.

It is an arithmetic number, because the mean of its divisors is an integer number (274715659339).

Almost surely, 2^549431318677 is an apocalyptic number.

It is an amenable number.

549431318677 is a deficient number, since it is larger than the sum of its proper divisors (1).

549431318677 is an equidigital number, since it uses as much as digits as its factorization.

549431318677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 58.

The spelling of 549431318677 in words is "five hundred forty-nine billion, four hundred thirty-one million, three hundred eighteen thousand, six hundred seventy-seven".