643117596 has 24 divisors (see below), whose sum is σ = 1637026944. Its totient is φ = 194884080.

The previous prime is 643117583. The next prime is 643117597. The reversal of 643117596 is 695711346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643117597) 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 7 ways as a sum of consecutive naturals, for example, 2435920 + ... + 2436183.

It is an arithmetic number, because the mean of its divisors is an integer number (68209456).

Almost surely, 2^643117596 is an apocalyptic number.

643117596 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

643117596 is an abundant number, since it is smaller than the sum of its proper divisors (993909348).

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

643117596 is a wasteful number, since it uses less digits than its factorization.

643117596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872121 (or 4872119 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 643117596 is about 25359.7633269713. The cubic root of 643117596 is about 863.1709135614.

The spelling of 643117596 in words is "six hundred forty-three million, one hundred seventeen thousand, five hundred ninety-six".