2491288166443 has 2 divisors, whose sum is σ = 2491288166444. Its totient is φ = 2491288166442.

The previous prime is 2491288166387. The next prime is 2491288166453. The reversal of 2491288166443 is 3446618821942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2491288166443 - 2⁴¹ = 292264910891 is a prime.

It is not a weakly prime, because it can be changed into another prime (2491288166453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245644083221 + 1245644083222.

It is an arithmetic number, because the mean of its divisors is an integer number (1245644083222).

Almost surely, 2^{2491288166443} is an apocalyptic number.

2491288166443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491288166443 is an equidigital number, since it uses as much as digits as its factorization.

2491288166443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15925248, while the sum is 58.

The spelling of 2491288166443 in words is "two trillion, four hundred ninety-one billion, two hundred eighty-eight million, one hundred sixty-six thousand, four hundred forty-three".