3851909648273 has 2 divisors, whose sum is σ = 3851909648274. Its totient is φ = 3851909648272.

The previous prime is 3851909648267. The next prime is 3851909648291. The reversal of 3851909648273 is 3728469091583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3746980946944 + 104928701329 = 1935712^2 + 323927^2 .

It is an emirp because it is prime and its reverse (3728469091583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3851909648273 - 2²² = 3851905453969 is a prime.

It is not a weakly prime, because it can be changed into another prime (3851909648243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1925954824136 + 1925954824137.

It is an arithmetic number, because the mean of its divisors is an integer number (1925954824137).

It is a 2-persistent number, because it is pandigital, and so is 2⋅3851909648273 = 7703819296546, but 3⋅3851909648273 = 11555728944819 is not.

Almost surely, 2^{3851909648273} is an apocalyptic number.

It is an amenable number.

3851909648273 is a deficient number, since it is larger than the sum of its proper divisors (1).

3851909648273 is an equidigital number, since it uses as much as digits as its factorization.

3851909648273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 3851909648273 in words is "three trillion, eight hundred fifty-one billion, nine hundred nine million, six hundred forty-eight thousand, two hundred seventy-three".