25726902089 has 4 divisors (see below), whose sum is σ = 29402173824. Its totient is φ = 22051630356.

The previous prime is 25726902041. The next prime is 25726902109. The reversal of 25726902089 is 98020962752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-25726902089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25726902989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1837635857 + ... + 1837635870.

It is an arithmetic number, because the mean of its divisors is an integer number (7350543456).

Almost surely, 2^25726902089 is an apocalyptic number.

It is an amenable number.

25726902089 is a deficient number, since it is larger than the sum of its proper divisors (3675271735).

25726902089 is an equidigital number, since it uses as much as digits as its factorization.

25726902089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675271734.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 25726902089 in words is "twenty-five billion, seven hundred twenty-six million, nine hundred two thousand, eighty-nine".