2557471680 has 84 divisors (see below), whose sum is σ = 8796646872. Its totient is φ = 681991680.

The previous prime is 2557471667. The next prime is 2557471681. The reversal of 2557471680 is 861747552.

2557471680 is a `hidden beast` number, since 2 + 5 + 574 + 71 + 6 + 8 + 0 = 666.

It is a super-2 number, since 2×2557471680² = 13081322788004044800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557471681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441126 + ... + 446885.

Almost surely, 2^2557471680 is an apocalyptic number.

2557471680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2557471680 is an abundant number, since it is smaller than the sum of its proper divisors (6239175192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2557471680 is a wasteful number, since it uses less digits than its factorization.

2557471680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888034 (or 888021 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The square root of 2557471680 is about 50571.4512348617. The cubic root of 2557471680 is about 1367.5302583356.

The spelling of 2557471680 in words is "two billion, five hundred fifty-seven million, four hundred seventy-one thousand, six hundred eighty".