25440485323 has 4 divisors (see below), whose sum is σ = 27753256728. Its totient is φ = 23127713920.

The previous prime is 25440485297. The next prime is 25440485333. The reversal of 25440485323 is 32358404452.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25440485323 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25440485333) 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, 1156385686 + ... + 1156385707.

It is an arithmetic number, because the mean of its divisors is an integer number (6938314182).

Almost surely, 2^25440485323 is an apocalyptic number.

25440485323 is a deficient number, since it is larger than the sum of its proper divisors (2312771405).

25440485323 is a wasteful number, since it uses less digits than its factorization.

25440485323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312771404.

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 25440485323 its reverse (32358404452), we get a palindrome (57798889775).

The spelling of 25440485323 in words is "twenty-five billion, four hundred forty million, four hundred eighty-five thousand, three hundred twenty-three".