645354262453546 has 8 divisors (see below), whose sum is σ = 968031571073184. Its totient is φ = 322677072095820.

The previous prime is 645354262453513. The next prime is 645354262453601.

645354262453546 is nontrivially palindromic in base 10.

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

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, 14358700 + ... + 38689543.

It is an arithmetic number, because the mean of its divisors is an integer number (121003946384148).

Almost surely, 2^{645354262453546} is an apocalyptic number.

645354262453546 is a deficient number, since it is larger than the sum of its proper divisors (322677308619638).

645354262453546 is a wasteful number, since it uses less digits than its factorization.

645354262453546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59130956.

The product of its digits is 1244160000, while the sum is 64.

The spelling of 645354262453546 in words is "six hundred forty-five trillion, three hundred fifty-four billion, two hundred sixty-two million, four hundred fifty-three thousand, five hundred forty-six".