25840718009 has 8 divisors (see below), whose sum is σ = 25920648000. Its totient is φ = 25760858032.

The previous prime is 25840717997. The next prime is 25840718021. The reversal of 25840718009 is 90081704852.

It is an interprime number because it is at equal distance from previous prime (25840717997) and next prime (25840718021).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25840718009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25840718609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776882 + ... + 809460.

It is an arithmetic number, because the mean of its divisors is an integer number (3240081000).

Almost surely, 2^25840718009 is an apocalyptic number.

It is an amenable number.

25840718009 is a deficient number, since it is larger than the sum of its proper divisors (79929991).

25840718009 is a wasteful number, since it uses less digits than its factorization.

25840718009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35007.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 25840718009 in words is "twenty-five billion, eight hundred forty million, seven hundred eighteen thousand, nine".