25212952189 has 2 divisors, whose sum is σ = 25212952190. Its totient is φ = 25212952188.

The previous prime is 25212952183. The next prime is 25212952201. The reversal of 25212952189 is 98125921252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21987848089 + 3225104100 = 148283^2 + 56790^2 .

It is a cyclic number.

It is not a de Polignac number, because 25212952189 - 2³ = 25212952181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25212952181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606476094 + 12606476095.

It is an arithmetic number, because the mean of its divisors is an integer number (12606476095).

Almost surely, 2^25212952189 is an apocalyptic number.

It is an amenable number.

25212952189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25212952189 is an equidigital number, since it uses as much as digits as its factorization.

25212952189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 46.

The spelling of 25212952189 in words is "twenty-five billion, two hundred twelve million, nine hundred fifty-two thousand, one hundred eighty-nine".