1331324765465 has 8 divisors (see below), whose sum is σ = 1667050141248. Its totient is φ = 1018752863920.

The previous prime is 1331324765461. The next prime is 1331324765479. The reversal of 1331324765465 is 5645674231331.

It is a happy number.

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

It is not a de Polignac number, because 1331324765465 - 2² = 1331324765461 is a prime.

It is a super-2 number, since 2×1331324765465² (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 (1331324765461) 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, 5788368431 + ... + 5788368660.

It is an arithmetic number, because the mean of its divisors is an integer number (208381267656).

Almost surely, 2^{1331324765465} is an apocalyptic number.

It is an amenable number.

1331324765465 is a deficient number, since it is larger than the sum of its proper divisors (335725375783).

1331324765465 is a wasteful number, since it uses less digits than its factorization.

1331324765465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11576737119.

The product of its digits is 5443200, while the sum is 50.

Adding to 1331324765465 its reverse (5645674231331), we get a palindrome (6976998996796).

The spelling of 1331324765465 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-four million, seven hundred sixty-five thousand, four hundred sixty-five".