2291610065609 has 2 divisors, whose sum is σ = 2291610065610. Its totient is φ = 2291610065608.

The previous prime is 2291610065557. The next prime is 2291610065621. The reversal of 2291610065609 is 9065600161922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1859481322384 + 432128743225 = 1363628^2 + 657365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2291610065609 - 2²⁴ = 2291593288393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2291610065659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145805032804 + 1145805032805.

It is an arithmetic number, because the mean of its divisors is an integer number (1145805032805).

Almost surely, 2^{2291610065609} is an apocalyptic number.

It is an amenable number.

2291610065609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2291610065609 is an equidigital number, since it uses as much as digits as its factorization.

2291610065609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 2291610065609 in words is "two trillion, two hundred ninety-one billion, six hundred ten million, sixty-five thousand, six hundred nine".