2565924491 has 4 divisors (see below), whose sum is σ = 2763303312. Its totient is φ = 2368545672.

The previous prime is 2565924463. The next prime is 2565924511. The reversal of 2565924491 is 1944295652.

2565924491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2565924491 - 2¹⁰ = 2565923467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565924421) 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, 98689391 + ... + 98689416.

It is an arithmetic number, because the mean of its divisors is an integer number (690825828).

Almost surely, 2^2565924491 is an apocalyptic number.

2565924491 is a deficient number, since it is larger than the sum of its proper divisors (197378821).

2565924491 is a wasteful number, since it uses less digits than its factorization.

2565924491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197378820.

The product of its digits is 777600, while the sum is 47.

The square root of 2565924491 is about 50654.9552462540. The cubic root of 2565924491 is about 1369.0352294356.

The spelling of 2565924491 in words is "two billion, five hundred sixty-five million, nine hundred twenty-four thousand, four hundred ninety-one".