2391994043267 has 2 divisors, whose sum is σ = 2391994043268. Its totient is φ = 2391994043266.

The previous prime is 2391994043261. The next prime is 2391994043321. The reversal of 2391994043267 is 7623404991932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2391994043267 - 2¹⁸ = 2391993781123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2391994043261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195997021633 + 1195997021634.

It is an arithmetic number, because the mean of its divisors is an integer number (1195997021634).

Almost surely, 2^{2391994043267} is an apocalyptic number.

2391994043267 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391994043267 is an equidigital number, since it uses as much as digits as its factorization.

2391994043267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17635968, while the sum is 59.

The spelling of 2391994043267 in words is "two trillion, three hundred ninety-one billion, nine hundred ninety-four million, forty-three thousand, two hundred sixty-seven".