25654579189 has 8 divisors (see below), whose sum is σ = 26051224320. Its totient is φ = 25258338336.

The previous prime is 25654579187. The next prime is 25654579219. The reversal of 25654579189 is 98197545652.

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

It is a cyclic number.

It is not a de Polignac number, because 25654579189 - 2¹ = 25654579187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25654579183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28092 + ... + 228250.

It is an arithmetic number, because the mean of its divisors is an integer number (3256403040).

Almost surely, 2^25654579189 is an apocalyptic number.

It is an amenable number.

25654579189 is a deficient number, since it is larger than the sum of its proper divisors (396645131).

25654579189 is a wasteful number, since it uses less digits than its factorization.

25654579189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202139.

The product of its digits is 27216000, while the sum is 61.

The spelling of 25654579189 in words is "twenty-five billion, six hundred fifty-four million, five hundred seventy-nine thousand, one hundred eighty-nine".