3984006265665 has 64 divisors (see below), whose sum is σ = 6824620396800. Its totient is φ = 1977638420480.

The previous prime is 3984006265663. The next prime is 3984006265669. The reversal of 3984006265665 is 5665626004893.

It is a happy number.

It is not a de Polignac number, because 3984006265665 - 2¹ = 3984006265663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3984006265599 and 3984006265608.

It is not an unprimeable number, because it can be changed into a prime (3984006265663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8393905 + ... + 8855825.

It is an arithmetic number, because the mean of its divisors is an integer number (106634693700).

Almost surely, 2^{3984006265665} is an apocalyptic number.

It is an amenable number.

3984006265665 is a deficient number, since it is larger than the sum of its proper divisors (2840614131135).

3984006265665 is a wasteful number, since it uses less digits than its factorization.

3984006265665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462322.

The product of its (nonzero) digits is 55987200, while the sum is 60.

The spelling of 3984006265665 in words is "three trillion, nine hundred eighty-four billion, six million, two hundred sixty-five thousand, six hundred sixty-five".