643096546 has 4 divisors (see below), whose sum is σ = 964644822. Its totient is φ = 321548272.

The previous prime is 643096529. The next prime is 643096589. The reversal of 643096546 is 645690346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 641862225 + 1234321 = 25335^2 + 1111^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160774135 + ... + 160774138.

Almost surely, 2^643096546 is an apocalyptic number.

643096546 is a deficient number, since it is larger than the sum of its proper divisors (321548276).

643096546 is a wasteful number, since it uses less digits than its factorization.

643096546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321548275.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 643096546 is about 25359.3482960426. The cubic root of 643096546 is about 863.1614959235.

The spelling of 643096546 in words is "six hundred forty-three million, ninety-six thousand, five hundred forty-six".