2557336349 has 2 divisors, whose sum is σ = 2557336350. Its totient is φ = 2557336348.

The previous prime is 2557336303. The next prime is 2557336381. The reversal of 2557336349 is 9436337552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2557324900 + 11449 = 50570^2 + 107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2557336349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557333349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278668174 + 1278668175.

It is an arithmetic number, because the mean of its divisors is an integer number (1278668175).

Almost surely, 2^2557336349 is an apocalyptic number.

It is an amenable number.

2557336349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557336349 is an equidigital number, since it uses as much as digits as its factorization.

2557336349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 47.

The square root of 2557336349 is about 50570.1131993987. The cubic root of 2557336349 is about 1367.5061365303.

The spelling of 2557336349 in words is "two billion, five hundred fifty-seven million, three hundred thirty-six thousand, three hundred forty-nine".