25033421806849 has 4 divisors (see below), whose sum is σ = 25033551987136. Its totient is φ = 25033291626564.

The previous prime is 25033421806817. The next prime is 25033421806879. The reversal of 25033421806849 is 94860812433052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25033421806849 - 2⁵ = 25033421806817 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 25033421806849.

It is not an unprimeable number, because it can be changed into a prime (25033421806879) 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, 64801269 + ... + 65186434.

It is an arithmetic number, because the mean of its divisors is an integer number (6258387996784).

Almost surely, 2^{25033421806849} is an apocalyptic number.

It is an amenable number.

25033421806849 is a deficient number, since it is larger than the sum of its proper divisors (130180287).

25033421806849 is a wasteful number, since it uses less digits than its factorization.

25033421806849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130180286.

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 25033421806849 in words is "twenty-five trillion, thirty-three billion, four hundred twenty-one million, eight hundred six thousand, eight hundred forty-nine".