2581305536 has 28 divisors (see below), whose sum is σ = 5194432080. Its totient is φ = 1272472320.

The previous prime is 2581305521. The next prime is 2581305539. The reversal of 2581305536 is 6355031852.

It is a self number, because there is not a number n which added to its sum of digits gives 2581305536.

It is not an unprimeable number, because it can be changed into a prime (2581305539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279491 + ... + 288578.

Almost surely, 2^2581305536 is an apocalyptic number.

It is an amenable number.

2581305536 is an abundant number, since it is smaller than the sum of its proper divisors (2613126544).

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

2581305536 is an equidigital number, since it uses as much as digits as its factorization.

2581305536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568152 (or 568142 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 2581305536 is about 50806.5501288958. The cubic root of 2581305536 is about 1371.7652730500.

The spelling of 2581305536 in words is "two billion, five hundred eighty-one million, three hundred five thousand, five hundred thirty-six".