1991011001082 has 16 divisors (see below), whose sum is σ = 4020682411200. Its totient is φ = 657226932192.

The previous prime is 1991011001051. The next prime is 1991011001093. The reversal of 1991011001082 is 2801001101991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1610849707 + ... + 1610850942.

It is an arithmetic number, because the mean of its divisors is an integer number (251292650700).

Almost surely, 2^{1991011001082} is an apocalyptic number.

1991011001082 is an abundant number, since it is smaller than the sum of its proper divisors (2029671410118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1991011001082 is a wasteful number, since it uses less digits than its factorization.

1991011001082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221700757.

The product of its (nonzero) digits is 1296, while the sum is 33.

The spelling of 1991011001082 in words is "one trillion, nine hundred ninety-one billion, eleven million, one thousand, eighty-two".