3965321568 has 192 divisors, whose sum is σ = 11630545920. Its totient is φ = 1175150592.

The previous prime is 3965321551. The next prime is 3965321609. The reversal of 3965321568 is 8651235693.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3929448 + ... + 3930456.

It is an arithmetic number, because the mean of its divisors is an integer number (60575760).

Almost surely, 2^3965321568 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 3965321568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5815272960).

3965321568 is an abundant number, since it is smaller than the sum of its proper divisors (7665224352).

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

3965321568 is a wasteful number, since it uses less digits than its factorization.

3965321568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149 (or 1141 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 48.

The square root of 3965321568 is about 62970.7993279425. The cubic root of 3965321568 is about 1582.8003491922.

The spelling of 3965321568 in words is "three billion, nine hundred sixty-five million, three hundred twenty-one thousand, five hundred sixty-eight".