2261206523449 has 2 divisors, whose sum is σ = 2261206523450. Its totient is φ = 2261206523448.

The previous prime is 2261206523399. The next prime is 2261206523453. The reversal of 2261206523449 is 9443256021622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1345275219600 + 915931303849 = 1159860^2 + 957043^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261206523449 - 2⁷ = 2261206523321 is a prime.

It is a super-2 number, since 2×2261206523449² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2261206523399 and 2261206523408.

It is not a weakly prime, because it can be changed into another prime (2261206520449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130603261724 + 1130603261725.

It is an arithmetic number, because the mean of its divisors is an integer number (1130603261725).

Almost surely, 2^{2261206523449} is an apocalyptic number.

It is an amenable number.

2261206523449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261206523449 is an equidigital number, since it uses as much as digits as its factorization.

2261206523449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 2261206523449 in words is "two trillion, two hundred sixty-one billion, two hundred six million, five hundred twenty-three thousand, four hundred forty-nine".