608778643 has 16 divisors (see below), whose sum is σ = 688203360. Its totient is φ = 533433600.

The previous prime is 608778641. The next prime is 608778671. The reversal of 608778643 is 346877806.

It is a cyclic number.

It is not a de Polignac number, because 608778643 - 2¹ = 608778641 is a prime.

It is a super-2 number, since 2×608778643² = 741222872345842898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (608778641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240223 + ... + 242743.

It is an arithmetic number, because the mean of its divisors is an integer number (43012710).

Almost surely, 2^608778643 is an apocalyptic number.

608778643 is a deficient number, since it is larger than the sum of its proper divisors (79424717).

608778643 is a wasteful number, since it uses less digits than its factorization.

608778643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 608778643 is about 24673.4400317426. The cubic root of 608778643 is about 847.5262067003.

The spelling of 608778643 in words is "six hundred eight million, seven hundred seventy-eight thousand, six hundred forty-three".