549775577957 has 2 divisors, whose sum is σ = 549775577958. Its totient is φ = 549775577956.

The previous prime is 549775577933. The next prime is 549775577971. The reversal of 549775577957 is 759775577945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496518938881 + 53256639076 = 704641^2 + 230774^2 .

It is a cyclic number.

It is not a de Polignac number, because 549775577957 - 2⁶ = 549775577893 is a prime.

It is a super-2 number, since 2×549775577957² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549775571957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274887788978 + 274887788979.

It is an arithmetic number, because the mean of its divisors is an integer number (274887788979).

Almost surely, 2^549775577957 is an apocalyptic number.

It is an amenable number.

549775577957 is a deficient number, since it is larger than the sum of its proper divisors (1).

549775577957 is an equidigital number, since it uses as much as digits as its factorization.

549775577957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3403417500, while the sum is 77.

The spelling of 549775577957 in words is "five hundred forty-nine billion, seven hundred seventy-five million, five hundred seventy-seven thousand, nine hundred fifty-seven".