2557553549 has 2 divisors, whose sum is σ = 2557553550. Its totient is φ = 2557553548.

The previous prime is 2557553533. The next prime is 2557553597. The reversal of 2557553549 is 9453557552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2148786025 + 408767524 = 46355^2 + 20218^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557553549 - 2⁴ = 2557553533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2557553497 and 2557553506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557553249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278776774 + 1278776775.

It is an arithmetic number, because the mean of its divisors is an integer number (1278776775).

Almost surely, 2^2557553549 is an apocalyptic number.

It is an amenable number.

2557553549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557553549 is an equidigital number, since it uses as much as digits as its factorization.

2557553549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4725000, while the sum is 50.

The square root of 2557553549 is about 50572.2606672868. The cubic root of 2557553549 is about 1367.5448504998.

The spelling of 2557553549 in words is "two billion, five hundred fifty-seven million, five hundred fifty-three thousand, five hundred forty-nine".