2564512845 has 16 divisors (see below), whose sum is σ = 4118480640. Its totient is φ = 1362653504.

The previous prime is 2564512843. The next prime is 2564512871. The reversal of 2564512845 is 5482154652.

It is a cyclic number.

It is not a de Polignac number, because 2564512845 - 2¹ = 2564512843 is a prime.

It is a super-2 number, since 2×2564512845² = 13153452264339988050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2564512797 and 2564512806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564512843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313749 + ... + 321818.

It is an arithmetic number, because the mean of its divisors is an integer number (257405040).

Almost surely, 2^2564512845 is an apocalyptic number.

It is an amenable number.

2564512845 is a deficient number, since it is larger than the sum of its proper divisors (1553967795).

2564512845 is a wasteful number, since it uses less digits than its factorization.

2564512845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635844.

The product of its digits is 384000, while the sum is 42.

The square root of 2564512845 is about 50641.0193913985. The cubic root of 2564512845 is about 1368.7841246679.

The spelling of 2564512845 in words is "two billion, five hundred sixty-four million, five hundred twelve thousand, eight hundred forty-five".