25945993218 has 8 divisors (see below), whose sum is σ = 51891986448. Its totient is φ = 8648664404.

The previous prime is 25945993217. The next prime is 25945993219. The reversal of 25945993218 is 81239954952.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25945993217) and next prime (25945993219).

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

25945993218 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (25945993217) 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, 2162166096 + ... + 2162166107.

It is an arithmetic number, because the mean of its divisors is an integer number (6486498306).

Almost surely, 2^25945993218 is an apocalyptic number.

25945993218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25945993218 is a wasteful number, since it uses less digits than its factorization.

25945993218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4324332208.

The product of its digits is 6998400, while the sum is 57.

The spelling of 25945993218 in words is "twenty-five billion, nine hundred forty-five million, nine hundred ninety-three thousand, two hundred eighteen".