2581549080 has 128 divisors (see below), whose sum is σ = 8460910080. Its totient is φ = 624926720.

The previous prime is 2581549073. The next prime is 2581549099. The reversal of 2581549080 is 809451852.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1605637 + ... + 1607243.

It is an arithmetic number, because the mean of its divisors is an integer number (66100860).

Almost surely, 2^2581549080 is an apocalyptic number.

2581549080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2581549080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4230455040).

2581549080 is an abundant number, since it is smaller than the sum of its proper divisors (5879361000).

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

2581549080 is a wasteful number, since it uses less digits than its factorization.

2581549080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849 (or 2845 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 2581549080 is about 50808.9468499397. The cubic root of 2581549080 is about 1371.8084133254.

The spelling of 2581549080 in words is "two billion, five hundred eighty-one million, five hundred forty-nine thousand, eighty".