645312343213546 has 32 divisors (see below), whose sum is σ = 970010795520000. Its totient is φ = 321975918708912.

The previous prime is 645312343213493. The next prime is 645312343213567.

645312343213546 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 645312343213493 and 645312343213502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46495586635 + ... + 46495600513.

It is an arithmetic number, because the mean of its divisors is an integer number (30312837360000).

Almost surely, 2^{645312343213546} is an apocalyptic number.

645312343213546 is a deficient number, since it is larger than the sum of its proper divisors (324698452306454).

645312343213546 is a wasteful number, since it uses less digits than its factorization.

645312343213546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28746.

The product of its digits is 18662400, while the sum is 52.

The spelling of 645312343213546 in words is "six hundred forty-five trillion, three hundred twelve billion, three hundred forty-three million, two hundred thirteen thousand, five hundred forty-six".