25006728289 has 16 divisors (see below), whose sum is σ = 26937308160. Its totient is φ = 23130192640.

The previous prime is 25006728283. The next prime is 25006728319. The reversal of 25006728289 is 98282760052.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25006728289 - 2²⁷ = 24872510561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25006728283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223107 + ... + 315895.

It is an arithmetic number, because the mean of its divisors is an integer number (1683581760).

Almost surely, 2^25006728289 is an apocalyptic number.

It is an amenable number.

25006728289 is a deficient number, since it is larger than the sum of its proper divisors (1930579871).

25006728289 is a wasteful number, since it uses less digits than its factorization.

25006728289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93080.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 25006728289 in words is "twenty-five billion, six million, seven hundred twenty-eight thousand, two hundred eighty-nine".