1323043943545 has 4 divisors (see below), whose sum is σ = 1587652732260. Its totient is φ = 1058435154832.

The previous prime is 1323043943531. The next prime is 1323043943561. The reversal of 1323043943545 is 5453493403231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 477447832576 + 845596110969 = 690976^2 + 919563^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323043943545 - 2²⁹ = 1322507072633 is a prime.

It is a super-2 number, since 2×1323043943545² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1323043943495 and 1323043943504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132304394350 + ... + 132304394359.

It is an arithmetic number, because the mean of its divisors is an integer number (396913183065).

Almost surely, 2^{1323043943545} is an apocalyptic number.

It is an amenable number.

1323043943545 is a deficient number, since it is larger than the sum of its proper divisors (264608788715).

1323043943545 is an equidigital number, since it uses as much as digits as its factorization.

1323043943545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264608788714.

The product of its (nonzero) digits is 2332800, while the sum is 46.

The spelling of 1323043943545 in words is "one trillion, three hundred twenty-three billion, forty-three million, nine hundred forty-three thousand, five hundred forty-five".