2564534639 has 8 divisors (see below), whose sum is σ = 2637467520. Its totient is φ = 2491792416.

The previous prime is 2564534629. The next prime is 2564534657. The reversal of 2564534639 is 9364354652.

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

It is a cyclic number.

It is not a de Polignac number, because 2564534639 - 2¹² = 2564530543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2564534593 and 2564534602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564534629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20159 + ... + 74400.

It is an arithmetic number, because the mean of its divisors is an integer number (329683440).

Almost surely, 2^2564534639 is an apocalyptic number.

2564534639 is a deficient number, since it is larger than the sum of its proper divisors (72932881).

2564534639 is an equidigital number, since it uses as much as digits as its factorization.

2564534639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95329.

The product of its digits is 2332800, while the sum is 47.

The square root of 2564534639 is about 50641.2345722337. The cubic root of 2564534639 is about 1368.7880021030.

The spelling of 2564534639 in words is "two billion, five hundred sixty-four million, five hundred thirty-four thousand, six hundred thirty-nine".