25044066109 has 2 divisors, whose sum is σ = 25044066110. Its totient is φ = 25044066108.

The previous prime is 25044066053. The next prime is 25044066163. The reversal of 25044066109 is 90166044052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21183929209 + 3860136900 = 145547^2 + 62130^2 .

It is a cyclic number.

It is not a de Polignac number, because 25044066109 - 2⁹ = 25044065597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25044069109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12522033054 + 12522033055.

It is an arithmetic number, because the mean of its divisors is an integer number (12522033055).

Almost surely, 2^25044066109 is an apocalyptic number.

It is an amenable number.

25044066109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25044066109 is an equidigital number, since it uses as much as digits as its factorization.

25044066109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 25044066109 in words is "twenty-five billion, forty-four million, sixty-six thousand, one hundred nine".