811971181132 has 24 divisors (see below), whose sum is σ = 1454213376000. Its totient is φ = 396484482576.

The previous prime is 811971181103. The next prime is 811971181181. The reversal of 811971181132 is 231181179118.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804369 + ... + 1506967.

It is an arithmetic number, because the mean of its divisors is an integer number (60592224000).

Almost surely, 2^811971181132 is an apocalyptic number.

It is an amenable number.

811971181132 is a deficient number, since it is larger than the sum of its proper divisors (642242194868).

811971181132 is a wasteful number, since it uses less digits than its factorization.

811971181132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709365 (or 709363 counting only the distinct ones).

The product of its digits is 24192, while the sum is 43.

The spelling of 811971181132 in words is "eight hundred eleven billion, nine hundred seventy-one million, one hundred eighty-one thousand, one hundred thirty-two".