2581450864 has 20 divisors (see below), whose sum is σ = 5014769560. Its totient is φ = 1287316800.

The previous prime is 2581450853. The next prime is 2581450909. The reversal of 2581450864 is 4680541852.

2581450864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2581450864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206787 + ... + 218914.

It is an arithmetic number, because the mean of its divisors is an integer number (250738478).

Almost surely, 2^2581450864 is an apocalyptic number.

It is an amenable number.

2581450864 is a deficient number, since it is larger than the sum of its proper divisors (2433318696).

2581450864 is a wasteful number, since it uses less digits than its factorization.

2581450864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426088 (or 426082 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 43.

The square root of 2581450864 is about 50807.9803180563. The cubic root of 2581450864 is about 1371.7910161168.

The spelling of 2581450864 in words is "two billion, five hundred eighty-one million, four hundred fifty thousand, eight hundred sixty-four".