2564564261 has 8 divisors (see below), whose sum is σ = 2933969280. Its totient is φ = 2195918928.

The previous prime is 2564564251. The next prime is 2564564339. The reversal of 2564564261 is 1624654652.

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

It is not a de Polignac number, because 2564564261 - 2¹⁴ = 2564547877 is a prime.

It is a super-3 number, since 3×2564564261³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564564251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182666 + ... + 196203.

It is an arithmetic number, because the mean of its divisors is an integer number (366746160).

Almost surely, 2^2564564261 is an apocalyptic number.

It is an amenable number.

2564564261 is a deficient number, since it is larger than the sum of its proper divisors (369405019).

2564564261 is an equidigital number, since it uses as much as digits as its factorization.

2564564261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379843.

The product of its digits is 345600, while the sum is 41.

The square root of 2564564261 is about 50641.5270405623. The cubic root of 2564564261 is about 1368.7932722056.

The spelling of 2564564261 in words is "two billion, five hundred sixty-four million, five hundred sixty-four thousand, two hundred sixty-one".