1171643516441 has 4 divisors (see below), whose sum is σ = 1171646562000. Its totient is φ = 1171640470884.

The previous prime is 1171643516401. The next prime is 1171643516473. The reversal of 1171643516441 is 1446153461711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1171643516441 - 2²⁶ = 1171576407577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1171643516392 and 1171643516401.

It is not an unprimeable number, because it can be changed into a prime (1171643516401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845231 + ... + 1748628.

It is an arithmetic number, because the mean of its divisors is an integer number (292911640500).

Almost surely, 2^{1171643516441} is an apocalyptic number.

It is an amenable number.

1171643516441 is a deficient number, since it is larger than the sum of its proper divisors (3045559).

1171643516441 is an equidigital number, since it uses as much as digits as its factorization.

1171643516441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045558.

The product of its digits is 241920, while the sum is 44.

The spelling of 1171643516441 in words is "one trillion, one hundred seventy-one billion, six hundred forty-three million, five hundred sixteen thousand, four hundred forty-one".