25140055609 has 2 divisors, whose sum is σ = 25140055610. Its totient is φ = 25140055608.

The previous prime is 25140055597. The next prime is 25140055639. The reversal of 25140055609 is 90655004152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24962420025 + 177635584 = 157995^2 + 13328^2 .

It is a cyclic number.

It is not a de Polignac number, because 25140055609 - 2²¹ = 25137958457 is a prime.

It is a super-2 number, since 2×25140055609² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25140055639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12570027804 + 12570027805.

It is an arithmetic number, because the mean of its divisors is an integer number (12570027805).

Almost surely, 2^25140055609 is an apocalyptic number.

It is an amenable number.

25140055609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25140055609 is an equidigital number, since it uses as much as digits as its factorization.

25140055609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 25140055609 in words is "twenty-five billion, one hundred forty million, fifty-five thousand, six hundred nine".