2391994043071 has 2 divisors, whose sum is σ = 2391994043072. Its totient is φ = 2391994043070.

The previous prime is 2391994043059. The next prime is 2391994043261. The reversal of 2391994043071 is 1703404991932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2391994043071 - 2¹⁵ = 2391994010303 is a prime.

It is a super-2 number, since 2×2391994043071² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391994043051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195997021535 + 1195997021536.

It is an arithmetic number, because the mean of its divisors is an integer number (1195997021536).

Almost surely, 2^{2391994043071} is an apocalyptic number.

2391994043071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391994043071 is an equidigital number, since it uses as much as digits as its factorization.

2391994043071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The spelling of 2391994043071 in words is "two trillion, three hundred ninety-one billion, nine hundred ninety-four million, forty-three thousand, seventy-one".