645610404016546 has 8 divisors (see below), whose sum is σ = 968415882186960. Its totient is φ = 322805109954228.

The previous prime is 645610404016511. The next prime is 645610404016559.

645610404016546 is nontrivially palindromic in base 10.

645610404016546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 645610404016493 and 645610404016502.

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, 36898176 + ... + 51504331.

It is an arithmetic number, because the mean of its divisors is an integer number (121051985273370).

Almost surely, 2^{645610404016546} is an apocalyptic number.

645610404016546 is a deficient number, since it is larger than the sum of its proper divisors (322805478170414).

645610404016546 is a wasteful number, since it uses less digits than its factorization.

645610404016546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92054048.

The product of its (nonzero) digits is 8294400, while the sum is 52.

It can be divided in two parts, 64561040 and 4016546, that added together give a palindrome (68577586).

The spelling of 645610404016546 in words is "six hundred forty-five trillion, six hundred ten billion, four hundred four million, sixteen thousand, five hundred forty-six".