2557218460 has 24 divisors (see below), whose sum is σ = 5406206400. Its totient is φ = 1016021184.

The previous prime is 2557218457. The next prime is 2557218473. The reversal of 2557218460 is 648127552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426084 + ... + 432043.

It is an arithmetic number, because the mean of its divisors is an integer number (225258600).

Almost surely, 2^2557218460 is an apocalyptic number.

2557218460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2557218460 is an abundant number, since it is smaller than the sum of its proper divisors (2848987940).

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

2557218460 is a wasteful number, since it uses less digits than its factorization.

2557218460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858285 (or 858283 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 2557218460 is about 50568.9475864389. The cubic root of 2557218460 is about 1367.4851229461.

The spelling of 2557218460 in words is "two billion, five hundred fifty-seven million, two hundred eighteen thousand, four hundred sixty".