2564281561018 has 8 divisors (see below), whose sum is σ = 4048865622720. Its totient is φ = 1214659686780.

The previous prime is 2564281561007. The next prime is 2564281561063. The reversal of 2564281561018 is 8101651824652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33740546818 + ... + 33740546893.

It is an arithmetic number, because the mean of its divisors is an integer number (506108202840).

Almost surely, 2^{2564281561018} is an apocalyptic number.

2564281561018 is a deficient number, since it is larger than the sum of its proper divisors (1484584061702).

2564281561018 is a wasteful number, since it uses less digits than its factorization.

2564281561018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67481093732.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 2564281561018 in words is "two trillion, five hundred sixty-four billion, two hundred eighty-one million, five hundred sixty-one thousand, eighteen".