25889122578 has 32 divisors (see below), whose sum is σ = 56512395072. Its totient is φ = 7841433600.

The previous prime is 25889122561. The next prime is 25889122579. The reversal of 25889122578 is 87522198852.

It is not an unprimeable number, because it can be changed into a prime (25889122579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46638 + ... + 232278.

It is an arithmetic number, because the mean of its divisors is an integer number (1766012346).

Almost surely, 2^25889122578 is an apocalyptic number.

25889122578 is an abundant number, since it is smaller than the sum of its proper divisors (30623272494).

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

25889122578 is a wasteful number, since it uses less digits than its factorization.

25889122578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187770.

The product of its digits is 6451200, while the sum is 57.

The spelling of 25889122578 in words is "twenty-five billion, eight hundred eighty-nine million, one hundred twenty-two thousand, five hundred seventy-eight".