2557798542 has 48 divisors (see below), whose sum is σ = 6015260160. Its totient is φ = 780808896.

The previous prime is 2557798531. The next prime is 2557798543. The reversal of 2557798542 is 2458977552.

2557798542 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 7 + 98 + 542 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557798543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13317 + ... + 72752.

It is an arithmetic number, because the mean of its divisors is an integer number (125317920).

Almost surely, 2^2557798542 is an apocalyptic number.

2557798542 is an abundant number, since it is smaller than the sum of its proper divisors (3457461618).

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

2557798542 is a wasteful number, since it uses less digits than its factorization.

2557798542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86217 (or 86214 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 54.

The square root of 2557798542 is about 50574.6828166030. The cubic root of 2557798542 is about 1367.5885156941.

The spelling of 2557798542 in words is "two billion, five hundred fifty-seven million, seven hundred ninety-eight thousand, five hundred forty-two".