1181081281906 has 8 divisors (see below), whose sum is σ = 1775259751680. Its totient is φ = 589328031348.

The previous prime is 1181081281873. The next prime is 1181081281957. The reversal of 1181081281906 is 6091821801811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606303586 + ... + 606305533.

It is an arithmetic number, because the mean of its divisors is an integer number (221907468960).

Almost surely, 2^{1181081281906} is an apocalyptic number.

1181081281906 is a deficient number, since it is larger than the sum of its proper divisors (594178469774).

1181081281906 is a wasteful number, since it uses less digits than its factorization.

1181081281906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212609608.

The product of its (nonzero) digits is 55296, while the sum is 46.

The spelling of 1181081281906 in words is "one trillion, one hundred eighty-one billion, eighty-one million, two hundred eighty-one thousand, nine hundred six".