3216857568 has 48 divisors (see below), whose sum is σ = 8449370496. Its totient is φ = 1071635840.

The previous prime is 3216857557. The next prime is 3216857573. The reversal of 3216857568 is 8657586123.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×3216857568² = 20696345225597749248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3216857568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164605 + ... + 183107.

It is an arithmetic number, because the mean of its divisors is an integer number (176028552).

Almost surely, 2^3216857568 is an apocalyptic number.

It is an amenable number.

3216857568 is an abundant number, since it is smaller than the sum of its proper divisors (5232512928).

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

3216857568 is a wasteful number, since it uses less digits than its factorization.

3216857568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20327 (or 20319 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 51.

The square root of 3216857568 is about 56717.3480339129. The cubic root of 3216857568 is about 1476.1957276005.

The spelling of 3216857568 in words is "three billion, two hundred sixteen million, eight hundred fifty-seven thousand, five hundred sixty-eight".