3999633652895 has 16 divisors (see below), whose sum is σ = 4929438399168. Its totient is φ = 3113127198720.

The previous prime is 3999633652879. The next prime is 3999633652909. The reversal of 3999633652895 is 5982563369993.

It is not a de Polignac number, because 3999633652895 - 2⁴ = 3999633652879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5632430 + ... + 6302660.

It is an arithmetic number, because the mean of its divisors is an integer number (308089899948).

Almost surely, 2^{3999633652895} is an apocalyptic number.

3999633652895 is a deficient number, since it is larger than the sum of its proper divisors (929804746273).

3999633652895 is a wasteful number, since it uses less digits than its factorization.

3999633652895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702530.

The product of its digits is 2550916800, while the sum is 77.

The spelling of 3999633652895 in words is "three trillion, nine hundred ninety-nine billion, six hundred thirty-three million, six hundred fifty-two thousand, eight hundred ninety-five".