999961446226571 has 2 divisors, whose sum is σ = 999961446226572. Its totient is φ = 999961446226570.

The previous prime is 999961446226537. The next prime is 999961446226573. The reversal of 999961446226571 is 175622644169999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999961446226571 is a prime.

It is a super-2 number, since 2×999961446226571² (a number of 31 digits) contains 22 as substring.

Together with 999961446226573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999961446226573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499980723113285 + 499980723113286.

It is an arithmetic number, because the mean of its divisors is an integer number (499980723113286).

Almost surely, 2^{999961446226571} is an apocalyptic number.

999961446226571 is a deficient number, since it is larger than the sum of its proper divisors (1).

999961446226571 is an equidigital number, since it uses as much as digits as its factorization.

999961446226571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3174474240, while the sum is 80.

The spelling of 999961446226571 in words is "nine hundred ninety-nine trillion, nine hundred sixty-one billion, four hundred forty-six million, two hundred twenty-six thousand, five hundred seventy-one".