25035340321 has 4 divisors (see below), whose sum is σ = 25042765972. Its totient is φ = 25027914672.

The previous prime is 25035340261. The next prime is 25035340327. The reversal of 25035340321 is 12304353052.

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 23392173025 + 1643167296 = 152945^2 + 40536^2 .

It is a cyclic number.

It is not a de Polignac number, because 25035340321 - 2⁹ = 25035339809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25035340321.

It is not an unprimeable number, because it can be changed into a prime (25035340327) 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, 3707766 + ... + 3714511.

It is an arithmetic number, because the mean of its divisors is an integer number (6260691493).

Almost surely, 2^25035340321 is an apocalyptic number.

It is an amenable number.

25035340321 is a deficient number, since it is larger than the sum of its proper divisors (7425651).

25035340321 is an equidigital number, since it uses as much as digits as its factorization.

25035340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7425650.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 25035340321 its reverse (12304353052), we get a palindrome (37339693373).

The spelling of 25035340321 in words is "twenty-five billion, thirty-five million, three hundred forty thousand, three hundred twenty-one".