1818181829091 has 8 divisors (see below), whose sum is σ = 2424291101440. Its totient is φ = 1212096888072.

The previous prime is 1818181829071. The next prime is 1818181829099. The reversal of 1818181829091 is 1909281818181.

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

It is not a de Polignac number, because 1818181829091 - 2⁵ = 1818181829059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818181829099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5907751 + ... + 6207888.

It is an arithmetic number, because the mean of its divisors is an integer number (303036387680).

Almost surely, 2^{1818181829091} is an apocalyptic number.

1818181829091 is a deficient number, since it is larger than the sum of its proper divisors (606109272349).

1818181829091 is a wasteful number, since it uses less digits than its factorization.

1818181829091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12165665.

The product of its (nonzero) digits is 663552, while the sum is 57.

The spelling of 1818181829091 in words is "one trillion, eight hundred eighteen billion, one hundred eighty-one million, eight hundred twenty-nine thousand, ninety-one".