1156433313491 has 2 divisors, whose sum is σ = 1156433313492. Its totient is φ = 1156433313490.

The previous prime is 1156433313397. The next prime is 1156433313533. The reversal of 1156433313491 is 1943133346511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156433313491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1156433313991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578216656745 + 578216656746.

It is an arithmetic number, because the mean of its divisors is an integer number (578216656746).

Almost surely, 2^{1156433313491} is an apocalyptic number.

1156433313491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156433313491 is an equidigital number, since it uses as much as digits as its factorization.

1156433313491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The spelling of 1156433313491 in words is "one trillion, one hundred fifty-six billion, four hundred thirty-three million, three hundred thirteen thousand, four hundred ninety-one".