2391994043207 has 32 divisors (see below), whose sum is σ = 2613467566080. Its totient is φ = 2182860359680.

The previous prime is 2391994043071. The next prime is 2391994043261. The reversal of 2391994043207 is 7023404991932.

It is not a de Polignac number, because 2391994043207 - 2⁸ = 2391994042951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391994043267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54182519 + ... + 54226647.

It is an arithmetic number, because the mean of its divisors is an integer number (81670861440).

Almost surely, 2^{2391994043207} is an apocalyptic number.

2391994043207 is a deficient number, since it is larger than the sum of its proper divisors (221473522873).

2391994043207 is a wasteful number, since it uses less digits than its factorization.

2391994043207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45463.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 2391994043207 in words is "two trillion, three hundred ninety-one billion, nine hundred ninety-four million, forty-three thousand, two hundred seven".