2557798530 has 288 divisors, whose sum is σ = 7760696832. Its totient is φ = 537062400.

The previous prime is 2557798459. The next prime is 2557798531. The reversal of 2557798530 is 358977552.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2557798531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 62385310 + ... + 62385350.

It is an arithmetic number, because the mean of its divisors is an integer number (26946864).

Almost surely, 2^2557798530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2557798530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3880348416).

2557798530 is an abundant number, since it is smaller than the sum of its proper divisors (5202898302).

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

2557798530 is a wasteful number, since it uses less digits than its factorization.

2557798530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 51.

The square root of 2557798530 is about 50574.6826979666. The cubic root of 2557798530 is about 1367.5885135554.

The spelling of 2557798530 in words is "two billion, five hundred fifty-seven million, seven hundred ninety-eight thousand, five hundred thirty".