1156433313991 has 2 divisors, whose sum is σ = 1156433313992. Its totient is φ = 1156433313990.

The previous prime is 1156433313979. The next prime is 1156433314019. The reversal of 1156433313991 is 1993133346511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1156433313991 - 2²¹ = 1156431216839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156433313491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578216656995 + 578216656996.

It is an arithmetic number, because the mean of its divisors is an integer number (578216656996).

Almost surely, 2^{1156433313991} is an apocalyptic number.

1156433313991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156433313991 is an equidigital number, since it uses as much as digits as its factorization.

1156433313991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 49.

The spelling of 1156433313991 in words is "one trillion, one hundred fifty-six billion, four hundred thirty-three million, three hundred thirteen thousand, nine hundred ninety-one".