1331664033642 has 16 divisors (see below), whose sum is σ = 2803503228960. Its totient is φ = 420525484272.

The previous prime is 1331664033613. The next prime is 1331664033643. The reversal of 1331664033642 is 2463304661331.

It is a junction number, because it is equal to n+sod(n) for n = 1331664033594 and 1331664033603.

It is not an unprimeable number, because it can be changed into a prime (1331664033643) 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, 5840631613 + ... + 5840631840.

It is an arithmetic number, because the mean of its divisors is an integer number (175218951810).

Almost surely, 2^{1331664033642} is an apocalyptic number.

1331664033642 is an abundant number, since it is smaller than the sum of its proper divisors (1471839195318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331664033642 is a wasteful number, since it uses less digits than its factorization.

1331664033642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11681263477.

The product of its (nonzero) digits is 559872, while the sum is 42.

Adding to 1331664033642 its reverse (2463304661331), we get a palindrome (3794968694973).

The spelling of 1331664033642 in words is "one trillion, three hundred thirty-one billion, six hundred sixty-four million, thirty-three thousand, six hundred forty-two".