25493550889 has 3 divisors (see below), whose sum is σ = 25493710557. Its totient is φ = 25493391222.

The previous prime is 25493550883. The next prime is 25493550937. The reversal of 25493550889 is 98805539452.

The square root of 25493550889 is 159667.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 25493550889 - 2⁵ = 25493550857 is a prime.

It is a super-2 number, since 2×25493550889² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25493550883) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 79834 + ... + 239500.

It is an arithmetic number, because the mean of its divisors is an integer number (8497903519).

Almost surely, 2^25493550889 is an apocalyptic number.

25493550889 is the 159667-th square number.

25493550889 is the 79834-th centered octagonal number.

It is an amenable number.

25493550889 is a deficient number, since it is larger than the sum of its proper divisors (159668).

25493550889 is an frugal number, since it uses more digits than its factorization.

25493550889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319334 (or 159667 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 58.

The spelling of 25493550889 in words is "twenty-five billion, four hundred ninety-three million, five hundred fifty thousand, eight hundred eighty-nine".