4025918355409 has 2 divisors, whose sum is σ = 4025918355410. Its totient is φ = 4025918355408.

The previous prime is 4025918355377. The next prime is 4025918355427. The reversal of 4025918355409 is 9045538195204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3127337591184 + 898580764225 = 1768428^2 + 947935^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025918355409 - 2⁵ = 4025918355377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4025918355409.

It is not a weakly prime, because it can be changed into another prime (4025918355499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2012959177704 + 2012959177705.

It is an arithmetic number, because the mean of its divisors is an integer number (2012959177705).

Almost surely, 2^{4025918355409} is an apocalyptic number.

It is an amenable number.

4025918355409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4025918355409 is an equidigital number, since it uses as much as digits as its factorization.

4025918355409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 4025918355409 in words is "four trillion, twenty-five billion, nine hundred eighteen million, three hundred fifty-five thousand, four hundred nine".