645340363043546 has 32 divisors (see below), whose sum is σ = 989430965365248. Its totient is φ = 315608243132160.

The previous prime is 645340363043491. The next prime is 645340363043557.

645340363043546 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 645340363043491 and 645340363043500.

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, 3543581 + ... + 36100383.

It is an arithmetic number, because the mean of its divisors is an integer number (30919717667664).

Almost surely, 2^{645340363043546} is an apocalyptic number.

645340363043546 is a deficient number, since it is larger than the sum of its proper divisors (344090602321702).

645340363043546 is a wasteful number, since it uses less digits than its factorization.

645340363043546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32558006.

The product of its (nonzero) digits is 111974400, while the sum is 56.

The spelling of 645340363043546 in words is "six hundred forty-five trillion, three hundred forty billion, three hundred sixty-three million, forty-three thousand, five hundred forty-six".