3996963543636 has 54 divisors (see below), whose sum is σ = 11752976139450. Its totient is φ = 1141989583392.

The previous prime is 3996963543589. The next prime is 3996963543637. The reversal of 3996963543636 is 6363453696993.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3198531941136 + 798431602500 = 1788444^2 + 893550^2 .

It is a super-2 number, since 2×3996963543636² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3996963543637) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1132924411 + ... + 1132927938.

Almost surely, 2^{3996963543636} is an apocalyptic number.

3996963543636 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3996963543636 is an abundant number, since it is smaller than the sum of its proper divisors (7756012595814).

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

3996963543636 is a wasteful number, since it uses less digits than its factorization.

3996963543636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265852373 (or 2265852361 counting only the distinct ones).

The product of its digits is 1530550080, while the sum is 72.

The spelling of 3996963543636 in words is "three trillion, nine hundred ninety-six billion, nine hundred sixty-three million, five hundred forty-three thousand, six hundred thirty-six".