1171822964881 has 4 divisors (see below), whose sum is σ = 1171830787812. Its totient is φ = 1171815141952.

The previous prime is 1171822964783. The next prime is 1171822964947. The reversal of 1171822964881 is 1884692281711.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161958758481 + 1009864206400 = 402441^2 + 1004920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171822964881 - 2³⁹ = 622067150993 is a prime.

It is a super-3 number, since 3×1171822964881³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171822964381) 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, 3682300 + ... + 3987853.

It is an arithmetic number, because the mean of its divisors is an integer number (292957696953).

Almost surely, 2^{1171822964881} is an apocalyptic number.

It is an amenable number.

1171822964881 is a deficient number, since it is larger than the sum of its proper divisors (7822931).

1171822964881 is an equidigital number, since it uses as much as digits as its factorization.

1171822964881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7822930.

The product of its digits is 3096576, while the sum is 58.

The spelling of 1171822964881 in words is "one trillion, one hundred seventy-one billion, eight hundred twenty-two million, nine hundred sixty-four thousand, eight hundred eighty-one".