2557456313 has 8 divisors (see below), whose sum is σ = 2585641800. Its totient is φ = 2529308160.

The previous prime is 2557456309. The next prime is 2557456339. The reversal of 2557456313 is 3136547552.

It can be written as a sum of positive squares in 4 ways, for example, as 799079824 + 1758376489 = 28268^2 + 41933^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2557456313 - 2² = 2557456309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557456813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141743 + ... + 158763.

It is an arithmetic number, because the mean of its divisors is an integer number (323205225).

Almost surely, 2^2557456313 is an apocalyptic number.

It is an amenable number.

2557456313 is a deficient number, since it is larger than the sum of its proper divisors (28185487).

2557456313 is a wasteful number, since it uses less digits than its factorization.

2557456313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18667.

The product of its digits is 378000, while the sum is 41.

The square root of 2557456313 is about 50571.2993010858. The cubic root of 2557456313 is about 1367.5275193180.

The spelling of 2557456313 in words is "two billion, five hundred fifty-seven million, four hundred fifty-six thousand, three hundred thirteen".