2564209313291 has 4 divisors (see below), whose sum is σ = 2646925742784. Its totient is φ = 2481492883800.

The previous prime is 2564209313273. The next prime is 2564209313297. The reversal of 2564209313291 is 1923139024652.

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

It is a cyclic number.

It is not a de Polignac number, because 2564209313291 - 2⁶ = 2564209313227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564209313297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41358214700 + ... + 41358214761.

It is an arithmetic number, because the mean of its divisors is an integer number (661731435696).

Almost surely, 2^{2564209313291} is an apocalyptic number.

2564209313291 is a deficient number, since it is larger than the sum of its proper divisors (82716429493).

2564209313291 is an equidigital number, since it uses as much as digits as its factorization.

2564209313291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82716429492.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 2564209313291 in words is "two trillion, five hundred sixty-four billion, two hundred nine million, three hundred thirteen thousand, two hundred ninety-one".