3215855856 has 20 divisors (see below), whose sum is σ = 8307627752. Its totient is φ = 1071951936.

The previous prime is 3215855831. The next prime is 3215855861. The reversal of 3215855856 is 6585585123.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 66996997 = 3215855856 / (3 + 2 + 1 + 5 + 8 + 5 + 5 + 8 + 5 + 6).

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 33498451 + ... + 33498546.

Almost surely, 2^3215855856 is an apocalyptic number.

It is an amenable number.

3215855856 is an abundant number, since it is smaller than the sum of its proper divisors (5091771896).

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

3215855856 is a wasteful number, since it uses less digits than its factorization.

3215855856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66997008 (or 66997002 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 48.

The square root of 3215855856 is about 56708.5166090597. The cubic root of 3215855856 is about 1476.0424852453.

The spelling of 3215855856 in words is "three billion, two hundred fifteen million, eight hundred fifty-five thousand, eight hundred fifty-six".