25877506889 has 8 divisors (see below), whose sum is σ = 27938286600. Its totient is φ = 23826756096.

The previous prime is 25877506883. The next prime is 25877506937. The reversal of 25877506889 is 98860577852.

It can be written as a sum of positive squares in 4 ways, for example, as 1129497664 + 24748009225 = 33608^2 + 157315^2 .

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

It is not a de Polignac number, because 25877506889 - 2⁴ = 25877506873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25877506883) 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 7 ways as a sum of consecutive naturals, for example, 2501864 + ... + 2512185.

It is an arithmetic number, because the mean of its divisors is an integer number (3492285825).

Almost surely, 2^25877506889 is an apocalyptic number.

It is an amenable number.

25877506889 is a deficient number, since it is larger than the sum of its proper divisors (2060779711).

25877506889 is a wasteful number, since it uses less digits than its factorization.

25877506889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5014459.

The product of its (nonzero) digits is 67737600, while the sum is 65.

The spelling of 25877506889 in words is "twenty-five billion, eight hundred seventy-seven million, five hundred six thousand, eight hundred eighty-nine".