2565642526 has 4 divisors (see below), whose sum is σ = 3848463792. Its totient is φ = 1282821262.

The previous prime is 2565642509. The next prime is 2565642539. The reversal of 2565642526 is 6252465652.

2565642526 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641410630 + ... + 641410633.

It is an arithmetic number, because the mean of its divisors is an integer number (962115948).

Almost surely, 2^2565642526 is an apocalyptic number.

2565642526 is a deficient number, since it is larger than the sum of its proper divisors (1282821266).

2565642526 is a wasteful number, since it uses less digits than its factorization.

2565642526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282821265.

The product of its digits is 864000, while the sum is 43.

The square root of 2565642526 is about 50652.1719771226. The cubic root of 2565642526 is about 1368.9850806282.

The spelling of 2565642526 in words is "two billion, five hundred sixty-five million, six hundred forty-two thousand, five hundred twenty-six".