1345641664123 has 4 divisors (see below), whose sum is σ = 1345821642400. Its totient is φ = 1345461685848.

The previous prime is 1345641664117. The next prime is 1345641664151. The reversal of 1345641664123 is 3214661465431.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345641664123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345641664163) 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, 89977923 + ... + 89992876.

It is an arithmetic number, because the mean of its divisors is an integer number (336455410600).

Almost surely, 2^{1345641664123} is an apocalyptic number.

1345641664123 is a deficient number, since it is larger than the sum of its proper divisors (179978277).

1345641664123 is an equidigital number, since it uses as much as digits as its factorization.

1345641664123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179978276.

The product of its digits is 1244160, while the sum is 46.

The spelling of 1345641664123 in words is "one trillion, three hundred forty-five billion, six hundred forty-one million, six hundred sixty-four thousand, one hundred twenty-three".