1992751168491 has 16 divisors (see below), whose sum is σ = 2952253094400. Its totient is φ = 1328487665544.

The previous prime is 1992751168487. The next prime is 1992751168501. The reversal of 1992751168491 is 1948611572991.

1992751168491 is a `hidden beast` number, since 1 + 9 + 9 + 2 + 75 + 11 + 68 + 491 = 666.

It is not a de Polignac number, because 1992751168491 - 2² = 1992751168487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1992751168391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2979930 + ... + 3586848.

It is an arithmetic number, because the mean of its divisors is an integer number (184515818400).

Almost surely, 2^{1992751168491} is an apocalyptic number.

1992751168491 is a deficient number, since it is larger than the sum of its proper divisors (959501925909).

1992751168491 is a wasteful number, since it uses less digits than its factorization.

1992751168491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728535 (or 728529 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 63.

The spelling of 1992751168491 in words is "one trillion, nine hundred ninety-two billion, seven hundred fifty-one million, one hundred sixty-eight thousand, four hundred ninety-one".