2581264420 has 24 divisors (see below), whose sum is σ = 6195034944. Its totient is φ = 885004896.

The previous prime is 2581264409. The next prime is 2581264423. The reversal of 2581264420 is 244621852.

2581264420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2581264423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9218662 + ... + 9218941.

It is an arithmetic number, because the mean of its divisors is an integer number (258126456).

Almost surely, 2^2581264420 is an apocalyptic number.

2581264420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2581264420 is an abundant number, since it is smaller than the sum of its proper divisors (3613770524).

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

2581264420 is a wasteful number, since it uses less digits than its factorization.

2581264420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18437619 (or 18437617 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 2581264420 is about 50806.1454944183. The cubic root of 2581264420 is about 1371.7579896812.

The spelling of 2581264420 in words is "two billion, five hundred eighty-one million, two hundred sixty-four thousand, four hundred twenty".