3999999999995 has 16 divisors (see below), whose sum is σ = 4851253693440. Its totient is φ = 3165978472800.

The previous prime is 3999999999967. The next prime is 4000000000039. The reversal of 3999999999995 is 5999999999993.

It is not a de Polignac number, because 3999999999995 - 2¹⁰ = 3999999998971 is a prime.

It is a super-9 number, since 9×3999999999995⁹ (a number of 115 digits) contains 999999999 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3999999999892 and 3999999999901.

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, 9008075 + ... + 9441684.

It is an arithmetic number, because the mean of its divisors is an integer number (303203355840).

Almost surely, 2^{3999999999995} is an apocalyptic number.

3999999999995 is a deficient number, since it is larger than the sum of its proper divisors (851253693445).

3999999999995 is a wasteful number, since it uses less digits than its factorization.

3999999999995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18450226.

The product of its digits is 470715894135, while the sum is 107.

It can be divided in two parts, 399999999999 and 5, that added together give a palindrome (400000000004).

The spelling of 3999999999995 in words is "three trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-five".