25443204513 has 32 divisors (see below), whose sum is σ = 37893018240. Its totient is φ = 15091061760.

The previous prime is 25443204497. The next prime is 25443204557. The reversal of 25443204513 is 31540234452.

It is not a de Polignac number, because 25443204513 - 2⁴ = 25443204497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25443204593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418231 + ... + 475187.

It is an arithmetic number, because the mean of its divisors is an integer number (1184156820).

Almost surely, 2^25443204513 is an apocalyptic number.

It is an amenable number.

25443204513 is a deficient number, since it is larger than the sum of its proper divisors (12449813727).

25443204513 is a wasteful number, since it uses less digits than its factorization.

25443204513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57457.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 25443204513 its reverse (31540234452), we get a palindrome (56983438965).

The spelling of 25443204513 in words is "twenty-five billion, four hundred forty-three million, two hundred four thousand, five hundred thirteen".