2809669671481 has 2 divisors, whose sum is σ = 2809669671482. Its totient is φ = 2809669671480.

The previous prime is 2809669671463. The next prime is 2809669671491. The reversal of 2809669671481 is 1841769669082.

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., 1503220671481 + 1306449000000 = 1226059^2 + 1143000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2809669671481 - 2⁵ = 2809669671449 is a prime.

It is a super-2 number, since 2×2809669671481² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2809669671491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404834835740 + 1404834835741.

It is an arithmetic number, because the mean of its divisors is an integer number (1404834835741).

Almost surely, 2^{2809669671481} is an apocalyptic number.

It is an amenable number.

2809669671481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2809669671481 is an equidigital number, since it uses as much as digits as its factorization.

2809669671481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62705664, while the sum is 67.

The spelling of 2809669671481 in words is "two trillion, eight hundred nine billion, six hundred sixty-nine million, six hundred seventy-one thousand, four hundred eighty-one".