3996859736736 has 144 divisors (see below), whose sum is σ = 11699273313000. Its totient is φ = 1293390249984.

The previous prime is 3996859736707. The next prime is 3996859736761. The reversal of 3996859736736 is 6376379586993.

It is a happy number.

3996859736736 is a `hidden beast` number, since 3 + 9 + 96 + 85 + 97 + 367 + 3 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3446800181136 + 550059555600 = 1856556^2 + 741660^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4366860 + ... + 5202228.

Almost surely, 2^{3996859736736} is an apocalyptic number.

3996859736736 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3996859736736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5849636656500).

3996859736736 is an abundant number, since it is smaller than the sum of its proper divisors (7702413576264).

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

3996859736736 is a wasteful number, since it uses less digits than its factorization.

3996859736736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835871 (or 835860 counting only the distinct ones).

The product of its digits is 8332994880, while the sum is 81.

The spelling of 3996859736736 in words is "three trillion, nine hundred ninety-six billion, eight hundred fifty-nine million, seven hundred thirty-six thousand, seven hundred thirty-six".