2564485109 has 16 divisors (see below), whose sum is σ = 2697779520. Its totient is φ = 2434400640.

The previous prime is 2564485067. The next prime is 2564485169. The reversal of 2564485109 is 9015844652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2564485109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2564485109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564485169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732854 + ... + 736344.

It is an arithmetic number, because the mean of its divisors is an integer number (168611220).

Almost surely, 2^2564485109 is an apocalyptic number.

2564485109 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2564485109 is a deficient number, since it is larger than the sum of its proper divisors (133294411).

2564485109 is a wasteful number, since it uses less digits than its factorization.

2564485109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 2564485109 is about 50640.7455415103. The cubic root of 2564485109 is about 1368.7791900421.

The spelling of 2564485109 in words is "two billion, five hundred sixty-four million, four hundred eighty-five thousand, one hundred nine".