3999515796 has 18 divisors (see below), whose sum is σ = 10109887242. Its totient is φ = 1333171920.

The previous prime is 3999515711. The next prime is 3999515833. The reversal of 3999515796 is 6975159993.

It is a happy number.

3999515796 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 51 + 579 + 6 = 666.

3999515796 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3842264196 + 157251600 = 61986^2 + 12540^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×3999515796² = 31992253204907027232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55548795 + ... + 55548866.

Almost surely, 2^3999515796 is an apocalyptic number.

3999515796 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3999515796 is an abundant number, since it is smaller than the sum of its proper divisors (6110371446).

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

3999515796 is a wasteful number, since it uses less digits than its factorization.

3999515796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111097671 (or 111097666 counting only the distinct ones).

The product of its digits is 20667150, while the sum is 63.

The square root of 3999515796 is about 63241.7251187853. The cubic root of 3999515796 is about 1587.3369972219.

The spelling of 3999515796 in words is "three billion, nine hundred ninety-nine million, five hundred fifteen thousand, seven hundred ninety-six".