25540443013 has 8 divisors (see below), whose sum is σ = 26465225600. Its totient is φ = 24630697728.

The previous prime is 25540443011. The next prime is 25540443031. The reversal of 25540443013 is 31034404552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25540443013 - 2¹ = 25540443011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540443011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3755868 + ... + 3762661.

It is an arithmetic number, because the mean of its divisors is an integer number (3308153200).

Almost surely, 2^25540443013 is an apocalyptic number.

It is an amenable number.

25540443013 is a deficient number, since it is larger than the sum of its proper divisors (924782587).

25540443013 is an equidigital number, since it uses as much as digits as its factorization.

25540443013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518651.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 25540443013 its reverse (31034404552), we get a palindrome (56574847565).

The spelling of 25540443013 in words is "twenty-five billion, five hundred forty million, four hundred forty-three thousand, thirteen".