4909165331261 has 2 divisors, whose sum is σ = 4909165331262. Its totient is φ = 4909165331260.

The previous prime is 4909165331227. The next prime is 4909165331269. The reversal of 4909165331261 is 1621335619094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4618175212036 + 290990119225 = 2148994^2 + 539435^2 .

It is a cyclic number.

It is not a de Polignac number, because 4909165331261 - 2¹⁸ = 4909165069117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4909165331269) 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 as a sum of consecutive naturals, namely, 2454582665630 + 2454582665631.

It is an arithmetic number, because the mean of its divisors is an integer number (2454582665631).

Almost surely, 2^{4909165331261} is an apocalyptic number.

It is an amenable number.

4909165331261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4909165331261 is an equidigital number, since it uses as much as digits as its factorization.

4909165331261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The spelling of 4909165331261 in words is "four trillion, nine hundred nine billion, one hundred sixty-five million, three hundred thirty-one thousand, two hundred sixty-one".