1223523568145 has 8 divisors (see below), whose sum is σ = 1468260599400. Its totient is φ = 978797309440.

The previous prime is 1223523568109. The next prime is 1223523568151. The reversal of 1223523568145 is 5418653253221.

It can be written as a sum of positive squares in 4 ways, for example, as 428071849984 + 795451718161 = 654272^2 + 891881^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1223523568145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1223523568145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2441120 + ... + 2899329.

It is an arithmetic number, because the mean of its divisors is an integer number (183532574925).

Almost surely, 2^{1223523568145} is an apocalyptic number.

It is an amenable number.

1223523568145 is a deficient number, since it is larger than the sum of its proper divisors (244737031255).

1223523568145 is an equidigital number, since it uses as much as digits as its factorization.

1223523568145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5386275.

The product of its digits is 1728000, while the sum is 47.

The spelling of 1223523568145 in words is "one trillion, two hundred twenty-three billion, five hundred twenty-three million, five hundred sixty-eight thousand, one hundred forty-five".