25340256593 has 4 divisors (see below), whose sum is σ = 26830859940. Its totient is φ = 23849653248.

The previous prime is 25340256527. The next prime is 25340256629. The reversal of 25340256593 is 39565204352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9138021649 + 16202234944 = 95593^2 + 127288^2 .

It is a cyclic number.

It is not a de Polignac number, because 25340256593 - 2²² = 25336062289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25340256503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745301648 + ... + 745301681.

It is an arithmetic number, because the mean of its divisors is an integer number (6707714985).

Almost surely, 2^25340256593 is an apocalyptic number.

It is an amenable number.

25340256593 is a deficient number, since it is larger than the sum of its proper divisors (1490603347).

25340256593 is a wasteful number, since it uses less digits than its factorization.

25340256593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490603346.

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 25340256593 in words is "twenty-five billion, three hundred forty million, two hundred fifty-six thousand, five hundred ninety-three".