25989000161 has 2 divisors, whose sum is σ = 25989000162. Its totient is φ = 25989000160.

The previous prime is 25989000139. The next prime is 25989000199. The reversal of 25989000161 is 16100098952.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13210054225 + 12778945936 = 114935^2 + 113044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25989000161 is a prime.

It is not a weakly prime, because it can be changed into another prime (25989000131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12994500080 + 12994500081.

It is an arithmetic number, because the mean of its divisors is an integer number (12994500081).

Almost surely, 2^25989000161 is an apocalyptic number.

It is an amenable number.

25989000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25989000161 is an equidigital number, since it uses as much as digits as its factorization.

25989000161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 25989000161 in words is "twenty-five billion, nine hundred eighty-nine million, one hundred sixty-one", and thus it is an aban number.