643352159 has 16 divisors (see below), whose sum is σ = 681550848. Its totient is φ = 606077472.

The previous prime is 643352119. The next prime is 643352201. The reversal of 643352159 is 951253346.

It is a cyclic number.

It is not a de Polignac number, because 643352159 - 2⁸ = 643351903 is a prime.

It is a super-2 number, since 2×643352159² = 827804000979922562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643352119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484154 + ... + 485480.

It is an arithmetic number, because the mean of its divisors is an integer number (42596928).

Almost surely, 2^643352159 is an apocalyptic number.

643352159 is a deficient number, since it is larger than the sum of its proper divisors (38198689).

643352159 is a wasteful number, since it uses less digits than its factorization.

643352159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654.

The product of its digits is 97200, while the sum is 38.

The square root of 643352159 is about 25364.3876133448. The cubic root of 643352159 is about 863.2758416751.

The spelling of 643352159 in words is "six hundred forty-three million, three hundred fifty-two thousand, one hundred fifty-nine".