1320310665525 has 12 divisors (see below), whose sum is σ = 2182913633792. Its totient is φ = 704165688240.

The previous prime is 1320310665521. The next prime is 1320310665533. The reversal of 1320310665525 is 5255660130231.

It is not a de Polignac number, because 1320310665525 - 2² = 1320310665521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320310665521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8802071029 + ... + 8802071178.

Almost surely, 2^{1320310665525} is an apocalyptic number.

1320310665525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320310665525 is a deficient number, since it is larger than the sum of its proper divisors (862602968267).

1320310665525 is a wasteful number, since it uses less digits than its factorization.

1320310665525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17604142220 (or 17604142215 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

Adding to 1320310665525 its reverse (5255660130231), we get a palindrome (6575970795756).

The spelling of 1320310665525 in words is "one trillion, three hundred twenty billion, three hundred ten million, six hundred sixty-five thousand, five hundred twenty-five".