4042402311491 has 2 divisors, whose sum is σ = 4042402311492. Its totient is φ = 4042402311490.

The previous prime is 4042402311473. The next prime is 4042402311511. The reversal of 4042402311491 is 1941132042404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4042402311491 is a prime.

It is not a weakly prime, because it can be changed into another prime (4042402311691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021201155745 + 2021201155746.

It is an arithmetic number, because the mean of its divisors is an integer number (2021201155746).

Almost surely, 2^{4042402311491} is an apocalyptic number.

4042402311491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042402311491 is an equidigital number, since it uses as much as digits as its factorization.

4042402311491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

Adding to 4042402311491 its reverse (1941132042404), we get a palindrome (5983534353895).

The spelling of 4042402311491 in words is "four trillion, forty-two billion, four hundred two million, three hundred eleven thousand, four hundred ninety-one".