645863335 has 16 divisors (see below), whose sum is σ = 836480736. Its totient is φ = 475901568.

The previous prime is 645863329. The next prime is 645863377. The reversal of 645863335 is 533368546.

It is a cyclic number.

It is not a de Polignac number, because 645863335 - 2¹¹ = 645861287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645863291 and 645863300.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 19717 + ... + 40993.

It is an arithmetic number, because the mean of its divisors is an integer number (52280046).

Almost surely, 2^645863335 is an apocalyptic number.

645863335 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

645863335 is a deficient number, since it is larger than the sum of its proper divisors (190617401).

645863335 is a wasteful number, since it uses less digits than its factorization.

645863335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21762.

The product of its digits is 777600, while the sum is 43.

The square root of 645863335 is about 25413.8414058166. The cubic root of 645863335 is about 864.3975824898.

The spelling of 645863335 in words is "six hundred forty-five million, eight hundred sixty-three thousand, three hundred thirty-five".