25697148089 has 4 divisors (see below), whose sum is σ = 25985880180. Its totient is φ = 25408416000.

The previous prime is 25697148083. The next prime is 25697148143. The reversal of 25697148089 is 98084179652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14420407225 + 11276740864 = 120085^2 + 106192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25697148089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25697148083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144365912 + ... + 144366089.

It is an arithmetic number, because the mean of its divisors is an integer number (6496470045).

Almost surely, 2^25697148089 is an apocalyptic number.

It is an amenable number.

25697148089 is a deficient number, since it is larger than the sum of its proper divisors (288732091).

25697148089 is an equidigital number, since it uses as much as digits as its factorization.

25697148089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288732090.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 25697148089 in words is "twenty-five billion, six hundred ninety-seven million, one hundred forty-eight thousand, eighty-nine".