25950918889 has 16 divisors (see below), whose sum is σ = 29859502336. Its totient is φ = 22092782400.

The previous prime is 25950918841. The next prime is 25950918911. The reversal of 25950918889 is 98881905952.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25950918889 - 2¹⁷ = 25950787817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25950918889.

It is not an unprimeable number, because it can be changed into a prime (25950918809) 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 15 ways as a sum of consecutive naturals, for example, 4647079 + ... + 4652659.

It is an arithmetic number, because the mean of its divisors is an integer number (1866218896).

Almost surely, 2^25950918889 is an apocalyptic number.

It is an amenable number.

25950918889 is a deficient number, since it is larger than the sum of its proper divisors (3908583447).

25950918889 is a wasteful number, since it uses less digits than its factorization.

25950918889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9976.

The product of its (nonzero) digits is 18662400, while the sum is 64.

The spelling of 25950918889 in words is "twenty-five billion, nine hundred fifty million, nine hundred eighteen thousand, eight hundred eighty-nine".