2557740447 has 12 divisors (see below), whose sum is σ = 3757133640. Its totient is φ = 1676258928.

The previous prime is 2557740439. The next prime is 2557740509. The reversal of 2557740447 is 7440477552.

It is not a de Polignac number, because 2557740447 - 2³ = 2557740439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557740247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2407888 + ... + 2408949.

It is an arithmetic number, because the mean of its divisors is an integer number (313094470).

Almost surely, 2^2557740447 is an apocalyptic number.

2557740447 is a deficient number, since it is larger than the sum of its proper divisors (1199393193).

2557740447 is a wasteful number, since it uses less digits than its factorization.

2557740447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4816902 (or 4816899 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 45.

The square root of 2557740447 is about 50574.1084647075. The cubic root of 2557740447 is about 1367.5781616527.

The spelling of 2557740447 in words is "two billion, five hundred fifty-seven million, seven hundred forty thousand, four hundred forty-seven".