3999656007396 has 243 divisors, whose sum is σ = 12497867572827. Its totient is φ = 1075153766400.

The previous prime is 3999656007377. The next prime is 3999656007419. The reversal of 3999656007396 is 6937006569993.

The square root of 3999656007396 is 1999914.

It is a perfect power (a square), and thus also a powerful number.

3999656007396 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 6 + 5 + 600 + 7 + 3 + 9 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 362488284900 + 3637167722496 = 602070^2 + 1907136^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1427937196 + ... + 1427939996.

Almost surely, 2^{3999656007396} is an apocalyptic number.

3999656007396 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

3999656007396 is the 1999914-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999656007396

3999656007396 is an abundant number, since it is smaller than the sum of its proper divisors (8498211565431).

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

3999656007396 is a wasteful number, since it uses less digits than its factorization.

3999656007396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660 (or 2830 counting only the distinct ones).

The product of its (nonzero) digits is 446410440, while the sum is 72.

The spelling of 3999656007396 in words is "three trillion, nine hundred ninety-nine billion, six hundred fifty-six million, seven thousand, three hundred ninety-six".