2564354081 has 4 divisors (see below), whose sum is σ = 2583072132. Its totient is φ = 2545636032.

The previous prime is 2564354071. The next prime is 2564354083. The reversal of 2564354081 is 1804534652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2196328225 + 368025856 = 46865^2 + 19184^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564354081 - 2¹⁴ = 2564337697 is a prime.

It is a super-2 number, since 2×2564354081² = 13151823705482709122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564354083) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9358820 + ... + 9359093.

It is an arithmetic number, because the mean of its divisors is an integer number (645768033).

Almost surely, 2^2564354081 is an apocalyptic number.

It is an amenable number.

2564354081 is a deficient number, since it is larger than the sum of its proper divisors (18718051).

2564354081 is a wasteful number, since it uses less digits than its factorization.

2564354081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18718050.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 2564354081 is about 50639.4518236523. The cubic root of 2564354081 is about 1368.7558778311.

The spelling of 2564354081 in words is "two billion, five hundred sixty-four million, three hundred fifty-four thousand, eighty-one".