25769597321 has 4 divisors (see below), whose sum is σ = 27751874052. Its totient is φ = 23787320592.

The previous prime is 25769597309. The next prime is 25769597327. The reversal of 25769597321 is 12379596752.

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 12530563600 + 13239033721 = 111940^2 + 115061^2 .

It is a cyclic number.

It is not a de Polignac number, because 25769597321 - 2⁶ = 25769597257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25769597327) 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, 991138346 + ... + 991138371.

It is an arithmetic number, because the mean of its divisors is an integer number (6937968513).

Almost surely, 2^25769597321 is an apocalyptic number.

It is an amenable number.

25769597321 is a deficient number, since it is larger than the sum of its proper divisors (1982276731).

25769597321 is a wasteful number, since it uses less digits than its factorization.

25769597321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982276730.

The product of its digits is 7144200, while the sum is 56.

The spelling of 25769597321 in words is "twenty-five billion, seven hundred sixty-nine million, five hundred ninety-seven thousand, three hundred twenty-one".