645694828496546 has 32 divisors (see below), whose sum is σ = 1045707922512000. Its totient is φ = 298103452071040.

The previous prime is 645694828496527. The next prime is 645694828496561.

645694828496546 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, 40661075 + ... + 54265206.

It is an arithmetic number, because the mean of its divisors is an integer number (32678372578500).

Almost surely, 2^{645694828496546} is an apocalyptic number.

645694828496546 is a deficient number, since it is larger than the sum of its proper divisors (400013094015454).

645694828496546 is a wasteful number, since it uses less digits than its factorization.

645694828496546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94931434.

The product of its digits is 85996339200, while the sum is 86.

The spelling of 645694828496546 in words is "six hundred forty-five trillion, six hundred ninety-four billion, eight hundred twenty-eight million, four hundred ninety-six thousand, five hundred forty-six".