645324686423546 has 32 divisors (see below), whose sum is σ = 970660652024448. Its totient is φ = 321772020754240.

The previous prime is 645324686423497. The next prime is 645324686423567.

645324686423546 is nontrivially palindromic in base 10.

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, 11840140931 + ... + 11840195433.

It is an arithmetic number, because the mean of its divisors is an integer number (30333145375764).

Almost surely, 2^{645324686423546} is an apocalyptic number.

645324686423546 is a deficient number, since it is larger than the sum of its proper divisors (325335965600902).

645324686423546 is a wasteful number, since it uses less digits than its factorization.

645324686423546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62326.

The product of its digits is 2388787200, while the sum is 68.

The spelling of 645324686423546 in words is "six hundred forty-five trillion, three hundred twenty-four billion, six hundred eighty-six million, four hundred twenty-three thousand, five hundred forty-six".