25652221989 has 8 divisors (see below), whose sum is σ = 35127367200. Its totient is φ = 16639279056.

The previous prime is 25652221981. The next prime is 25652222027. The reversal of 25652221989 is 98912225652.

It is a happy number.

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

It is not a de Polignac number, because 25652221989 - 2³ = 25652221981 is a prime.

It is a super-2 number, since 2×25652221989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25652221981) 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, 115550439 + ... + 115550660.

It is an arithmetic number, because the mean of its divisors is an integer number (4390920900).

Almost surely, 2^25652221989 is an apocalyptic number.

It is an amenable number.

25652221989 is a deficient number, since it is larger than the sum of its proper divisors (9475145211).

25652221989 is a wasteful number, since it uses less digits than its factorization.

25652221989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231101139.

The product of its digits is 1555200, while the sum is 51.

The spelling of 25652221989 in words is "twenty-five billion, six hundred fifty-two million, two hundred twenty-one thousand, nine hundred eighty-nine".