1811891892082 has 8 divisors (see below), whose sum is σ = 2717955802476. Its totient is φ = 905906624592.

The previous prime is 1811891892079. The next prime is 1811891892089. The reversal of 1811891892082 is 2802981981181.

It can be written as a sum of positive squares in 2 ways, for example, as 1810265302521 + 1626589561 = 1345461^2 + 40331^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1811891892089) by changing a digit.

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, 19603093 + ... + 19695304.

Almost surely, 2^{1811891892082} is an apocalyptic number.

1811891892082 is a deficient number, since it is larger than the sum of its proper divisors (906063910394).

1811891892082 is a wasteful number, since it uses less digits than its factorization.

1811891892082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39321452.

The product of its (nonzero) digits is 1327104, while the sum is 58.

The spelling of 1811891892082 in words is "one trillion, eight hundred eleven billion, eight hundred ninety-one million, eight hundred ninety-two thousand, eighty-two".