1331663454611 has 4 divisors (see below), whose sum is σ = 1521901090992. Its totient is φ = 1141425818232.

The previous prime is 1331663454599. The next prime is 1331663454643. The reversal of 1331663454611 is 1164543661331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1331663454611 - 2³⁸ = 1056785547667 is a prime.

It is a super-2 number, since 2×1331663454611² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331663454911) 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 3 ways as a sum of consecutive naturals, for example, 95118818180 + ... + 95118818193.

It is an arithmetic number, because the mean of its divisors is an integer number (380475272748).

Almost surely, 2^{1331663454611} is an apocalyptic number.

1331663454611 is a deficient number, since it is larger than the sum of its proper divisors (190237636381).

1331663454611 is an equidigital number, since it uses as much as digits as its factorization.

1331663454611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190237636380.

The product of its digits is 466560, while the sum is 44.

The spelling of 1331663454611 in words is "one trillion, three hundred thirty-one billion, six hundred sixty-three million, four hundred fifty-four thousand, six hundred eleven".