25491693241 has 8 divisors (see below), whose sum is σ = 29135545344. Its totient is φ = 21848386560.

The previous prime is 25491693209. The next prime is 25491693257. The reversal of 25491693241 is 14239619452.

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

It is not a de Polignac number, because 25491693241 - 2⁵ = 25491693209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25491693191 and 25491693200.

It is not an unprimeable number, because it can be changed into a prime (25491693541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30745 + ... + 227878.

It is an arithmetic number, because the mean of its divisors is an integer number (3641943168).

Almost surely, 2^25491693241 is an apocalyptic number.

It is an amenable number.

25491693241 is a deficient number, since it is larger than the sum of its proper divisors (3643852103).

25491693241 is a wasteful number, since it uses less digits than its factorization.

25491693241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272711.

The product of its digits is 466560, while the sum is 46.

The spelling of 25491693241 in words is "twenty-five billion, four hundred ninety-one million, six hundred ninety-three thousand, two hundred forty-one".