3965320081 has 8 divisors (see below), whose sum is σ = 4203862784. Its totient is φ = 3733691760.

The previous prime is 3965320061. The next prime is 3965320087. The reversal of 3965320081 is 1800235693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3965320081 - 2¹¹ = 3965318033 is a prime.

It is a super-2 number, since 2×3965320081² = 31447526689563693122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3965320081.

It is not an unprimeable number, because it can be changed into a prime (3965320087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1727415 + ... + 1729708.

It is an arithmetic number, because the mean of its divisors is an integer number (525482848).

Almost surely, 2^3965320081 is an apocalyptic number.

3965320081 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3965320081 is a deficient number, since it is larger than the sum of its proper divisors (238542703).

3965320081 is a wasteful number, since it uses less digits than its factorization.

3965320081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457191.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 3965320081 is about 62970.7875208815. The cubic root of 3965320081 is about 1582.8001513415.

The spelling of 3965320081 in words is "three billion, nine hundred sixty-five million, three hundred twenty thousand, eighty-one".