645364463546 has 32 divisors (see below), whose sum is σ = 1102980907008. Its totient is φ = 280334870640.

The previous prime is 645364463519. The next prime is 645364463587.

645364463546 is nontrivially palindromic in base 10.

645364463546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 645364463491 and 645364463500.

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, 36650 + ... + 1136693.

It is an arithmetic number, because the mean of its divisors is an integer number (34468153344).

Almost surely, 2^645364463546 is an apocalyptic number.

645364463546 is a deficient number, since it is larger than the sum of its proper divisors (457616443462).

645364463546 is a wasteful number, since it uses less digits than its factorization.

645364463546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174466.

The product of its digits is 74649600, while the sum is 56.

The spelling of 645364463546 in words is "six hundred forty-five billion, three hundred sixty-four million, four hundred sixty-three thousand, five hundred forty-six".