1811409124996 has 9 divisors (see below), whose sum is σ = 3169970679351. Its totient is φ = 905703216612.

The previous prime is 1811409124991. The next prime is 1811409124999. The reversal of 1811409124996 is 6994219041181.

It is a happy number.

The square root of 1811409124996 is 1345886.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1811409124991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2355301 + ... + 3028243.

Almost surely, 2^{1811409124996} is an apocalyptic number.

1811409124996 is the 1345886-th square number.

It is an amenable number.

1811409124996 is a deficient number, since it is larger than the sum of its proper divisors (1358561554355).

1811409124996 is an frugal number, since it uses more digits than its factorization.

1811409124996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345890 (or 672945 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 1811409124996 in words is "one trillion, eight hundred eleven billion, four hundred nine million, one hundred twenty-four thousand, nine hundred ninety-six".