25573446889 has 9 divisors (see below), whose sum is σ = 26189051133. Its totient is φ = 24971999052.

The previous prime is 25573446823. The next prime is 25573446907. The reversal of 25573446889 is 98864437552.

The square root of 25573446889 is 159917.

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

It is a de Polignac number, because none of the positive numbers 2^k-25573446889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25573446089) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6874572 + ... + 6878290.

Almost surely, 2^25573446889 is an apocalyptic number.

25573446889 is the 159917-th square number.

25573446889 is the 79959-th centered octagonal number.

It is an amenable number.

25573446889 is a deficient number, since it is larger than the sum of its proper divisors (615604244).

25573446889 is an frugal number, since it uses more digits than its factorization.

25573446889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7524 (or 3762 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 61.

The spelling of 25573446889 in words is "twenty-five billion, five hundred seventy-three million, four hundred forty-six thousand, eight hundred eighty-nine".