25278030305009 has 2 divisors, whose sum is σ = 25278030305010. Its totient is φ = 25278030305008.

The previous prime is 25278030304997. The next prime is 25278030305107. The reversal of 25278030305009 is 90050303087252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21455164608784 + 3822865696225 = 4631972^2 + 1955215^2 .

It is a cyclic number.

It is not a de Polignac number, because 25278030305009 - 2⁴ = 25278030304993 is a prime.

It is a super-2 number, since 2×25278030305009² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25278030301009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639015152504 + 12639015152505.

It is an arithmetic number, because the mean of its divisors is an integer number (12639015152505).

Almost surely, 2^{25278030305009} is an apocalyptic number.

It is an amenable number.

25278030305009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25278030305009 is an equidigital number, since it uses as much as digits as its factorization.

25278030305009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 25278030305009 in words is "twenty-five trillion, two hundred seventy-eight billion, thirty million, three hundred five thousand, nine".