25989973889 has 8 divisors (see below), whose sum is σ = 28365991968. Its totient is φ = 23616171360.

The previous prime is 25989973853. The next prime is 25989973903. The reversal of 25989973889 is 98837998952.

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 25989973889 - 2²⁴ = 25973196673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25989973489) 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, 529307 + ... + 576320.

It is an arithmetic number, because the mean of its divisors is an integer number (3545748996).

Almost surely, 2^25989973889 is an apocalyptic number.

It is an amenable number.

25989973889 is a deficient number, since it is larger than the sum of its proper divisors (2376018079).

25989973889 is a wasteful number, since it uses less digits than its factorization.

25989973889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107775.

The product of its digits is 705438720, while the sum is 77.

The spelling of 25989973889 in words is "twenty-five billion, nine hundred eighty-nine million, nine hundred seventy-three thousand, eight hundred eighty-nine".