1042043998591 has 2 divisors, whose sum is σ = 1042043998592. Its totient is φ = 1042043998590.

The previous prime is 1042043998577. The next prime is 1042043998637. The reversal of 1042043998591 is 1958993402401.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1042043998591 - 2⁵ = 1042043998559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042043998091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521021999295 + 521021999296.

It is an arithmetic number, because the mean of its divisors is an integer number (521021999296).

Almost surely, 2^{1042043998591} is an apocalyptic number.

1042043998591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042043998591 is an equidigital number, since it uses as much as digits as its factorization.

1042043998591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 1042043998591 in words is "one trillion, forty-two billion, forty-three million, nine hundred ninety-eight thousand, five hundred ninety-one".