2145326616523 has 4 divisors (see below), whose sum is σ = 2145333003840. Its totient is φ = 2145320229208.

The previous prime is 2145326616479. The next prime is 2145326616557. The reversal of 2145326616523 is 3256166235412.

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 2145326616523 - 2¹⁷ = 2145326485451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145326616583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2660140 + ... + 3371497.

It is an arithmetic number, because the mean of its divisors is an integer number (536333250960).

Almost surely, 2^{2145326616523} is an apocalyptic number.

2145326616523 is a deficient number, since it is larger than the sum of its proper divisors (6387317).

2145326616523 is an equidigital number, since it uses as much as digits as its factorization.

2145326616523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6387316.

The product of its digits is 1555200, while the sum is 46.

The spelling of 2145326616523 in words is "two trillion, one hundred forty-five billion, three hundred twenty-six million, six hundred sixteen thousand, five hundred twenty-three".