25641333849 has 8 divisors (see below), whose sum is σ = 34245333472. Its totient is φ = 17065778400.

The previous prime is 25641333833. The next prime is 25641333857. The reversal of 25641333849 is 94833314652.

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

It is not a de Polignac number, because 25641333849 - 2⁴ = 25641333833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25641333798 and 25641333807.

It is not an unprimeable number, because it can be changed into a prime (25641333859) 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, 7108939 + ... + 7112544.

It is an arithmetic number, because the mean of its divisors is an integer number (4280666684).

Almost surely, 2^25641333849 is an apocalyptic number.

It is an amenable number.

25641333849 is a deficient number, since it is larger than the sum of its proper divisors (8603999623).

25641333849 is a wasteful number, since it uses less digits than its factorization.

25641333849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14222087.

The product of its digits is 1866240, while the sum is 48.

The spelling of 25641333849 in words is "twenty-five billion, six hundred forty-one million, three hundred thirty-three thousand, eight hundred forty-nine".