3216651264 has 308 divisors, whose sum is σ = 10023422080. Its totient is φ = 1030164480.

The previous prime is 3216651259. The next prime is 3216651271. The reversal of 3216651264 is 4621566123.

3216651264 is a `hidden beast` number, since 3 + 21 + 66 + 512 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 23141307 + ... + 23141445.

Almost surely, 2^3216651264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3216651264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5011711040).

3216651264 is an abundant number, since it is smaller than the sum of its proper divisors (6806770816).

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

3216651264 is an equidigital number, since it uses as much as digits as its factorization.

3216651264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 175 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 3216651264 is about 56715.5293019469. The cubic root of 3216651264 is about 1476.1641697227.

The spelling of 3216651264 in words is "three billion, two hundred sixteen million, six hundred fifty-one thousand, two hundred sixty-four".