645848546 has 32 divisors (see below), whose sum is σ = 1121126400. Its totient is φ = 273326400.

The previous prime is 645848537. The next prime is 645848549.

645848546 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 645848494 and 645848503.

It is not an unprimeable number, because it can be changed into a prime (645848549) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 397616 + ... + 399236.

It is an arithmetic number, because the mean of its divisors is an integer number (35035200).

Almost surely, 2^645848546 is an apocalyptic number.

645848546 is a deficient number, since it is larger than the sum of its proper divisors (475277854).

645848546 is a wasteful number, since it uses less digits than its factorization.

645848546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its digits is 3686400, while the sum is 50.

The square root of 645848546 is about 25413.5504406606. The cubic root of 645848546 is about 864.3909847713.

The spelling of 645848546 in words is "six hundred forty-five million, eight hundred forty-eight thousand, five hundred forty-six".