645024420546 has 16 divisors (see below), whose sum is σ = 1407326008608. Its totient is φ = 195461945600.

The previous prime is 645024420497. The next prime is 645024420559.

645024420546 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 645024420498 and 645024420507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4886548575 + ... + 4886548706.

It is an arithmetic number, because the mean of its divisors is an integer number (87957875538).

Almost surely, 2^645024420546 is an apocalyptic number.

645024420546 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

645024420546 is an abundant number, since it is smaller than the sum of its proper divisors (762301588062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645024420546 is a wasteful number, since it uses less digits than its factorization.

645024420546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9773097297.

The product of its (nonzero) digits is 921600, while the sum is 42.

The spelling of 645024420546 in words is "six hundred forty-five billion, twenty-four million, four hundred twenty thousand, five hundred forty-six".