1306321534643 has 4 divisors (see below), whose sum is σ = 1306323848520. Its totient is φ = 1306319220768.

The previous prime is 1306321534591. The next prime is 1306321534667. The reversal of 1306321534643 is 3464351236031.

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

It is a cyclic number.

It is not a de Polignac number, because 1306321534643 - 2²⁸ = 1306053099187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1306321534643.

It is not an unprimeable number, because it can be changed into a prime (1306321504643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309371 + ... + 1645707.

It is an arithmetic number, because the mean of its divisors is an integer number (326580962130).

Almost surely, 2^{1306321534643} is an apocalyptic number.

1306321534643 is a deficient number, since it is larger than the sum of its proper divisors (2313877).

1306321534643 is an equidigital number, since it uses as much as digits as its factorization.

1306321534643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313876.

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 1306321534643 in words is "one trillion, three hundred six billion, three hundred twenty-one million, five hundred thirty-four thousand, six hundred forty-three".