3216681646 has 32 divisors (see below), whose sum is σ = 5171231520. Its totient is φ = 1496102400.

The previous prime is 3216681623. The next prime is 3216681661. The reversal of 3216681646 is 6461866123.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2171226 + ... + 2172706.

It is an arithmetic number, because the mean of its divisors is an integer number (161600985).

Almost surely, 2^3216681646 is an apocalyptic number.

3216681646 is a deficient number, since it is larger than the sum of its proper divisors (1954549874).

3216681646 is a wasteful number, since it uses less digits than its factorization.

3216681646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500.

The product of its digits is 248832, while the sum is 43.

The square root of 3216681646 is about 56715.7971468267. The cubic root of 3216681646 is about 1476.1688172764.

The spelling of 3216681646 in words is "three billion, two hundred sixteen million, six hundred eighty-one thousand, six hundred forty-six".