2557953649 has 2 divisors, whose sum is σ = 2557953650. Its totient is φ = 2557953648.

The previous prime is 2557953617. The next prime is 2557953659. The reversal of 2557953649 is 9463597552.

2557953649 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., 1533505600 + 1024448049 = 39160^2 + 32007^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557953649 - 2⁵ = 2557953617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2557953649.

It is not a weakly prime, because it can be changed into another prime (2557953659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278976824 + 1278976825.

It is an arithmetic number, because the mean of its divisors is an integer number (1278976825).

Almost surely, 2^2557953649 is an apocalyptic number.

It is an amenable number.

2557953649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557953649 is an equidigital number, since it uses as much as digits as its factorization.

2557953649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206000, while the sum is 55.

The square root of 2557953649 is about 50576.2162384653. The cubic root of 2557953649 is about 1367.6161590315.

The spelling of 2557953649 in words is "two billion, five hundred fifty-seven million, nine hundred fifty-three thousand, six hundred forty-nine".