25673105491 has 4 divisors (see below), whose sum is σ = 28007024184. Its totient is φ = 23339186800.

The previous prime is 25673105467. The next prime is 25673105519. The reversal of 25673105491 is 19450137652.

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

It is a cyclic number.

It is not a de Polignac number, because 25673105491 - 2¹⁵ = 25673072723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25673105401) 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, 1166959330 + ... + 1166959351.

It is an arithmetic number, because the mean of its divisors is an integer number (7001756046).

Almost surely, 2^25673105491 is an apocalyptic number.

25673105491 is a deficient number, since it is larger than the sum of its proper divisors (2333918693).

25673105491 is a wasteful number, since it uses less digits than its factorization.

25673105491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333918692.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 25673105491 in words is "twenty-five billion, six hundred seventy-three million, one hundred five thousand, four hundred ninety-one".