25307409238609 has 9 divisors (see below), whose sum is σ = 25533924104923. Its totient is φ = 25082886432352.

The previous prime is 25307409238589. The next prime is 25307409238621. The reversal of 25307409238609 is 90683290470352.

The square root of 25307409238609 is 5030647.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 445936806225 + 24861472432384 = 667785^2 + 4986128^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25307409238609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25307409238409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 568440852 + ... + 568485370.

Almost surely, 2^{25307409238609} is an apocalyptic number.

25307409238609 is the 5030647-th square number.

25307409238609 is the 2515324-th centered octagonal number.

It is an amenable number.

25307409238609 is a deficient number, since it is larger than the sum of its proper divisors (226514866314).

25307409238609 is an frugal number, since it uses more digits than its factorization.

25307409238609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89264 (or 44632 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 25307409238609 in words is "twenty-five trillion, three hundred seven billion, four hundred nine million, two hundred thirty-eight thousand, six hundred nine".