2580564420 has 720 divisors, whose sum is σ = 10428264000. Its totient is φ = 530385408.

The previous prime is 2580564407. The next prime is 2580564431. The reversal of 2580564420 is 244650852.

It is a happy number.

2580564420 is a `hidden beast` number, since 2 + 5 + 8 + 0 + 5 + 644 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 239 ways as a sum of consecutive naturals, for example, 43738351 + ... + 43738409.

It is an arithmetic number, because the mean of its divisors is an integer number (14483700).

Almost surely, 2^2580564420 is an apocalyptic number.

2580564420 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 2580564420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5214132000).

2580564420 is an abundant number, since it is smaller than the sum of its proper divisors (7847699580).

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

2580564420 is a wasteful number, since it uses less digits than its factorization.

2580564420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 2580564420 is about 50799.2560969154. The cubic root of 2580564420 is about 1371.6339784410.

The spelling of 2580564420 in words is "two billion, five hundred eighty million, five hundred sixty-four thousand, four hundred twenty".