3646963943532 has 576 divisors, whose sum is σ = 12286551723264. Its totient is φ = 884815626240.

The previous prime is 3646963943531. The next prime is 3646963943587. The reversal of 3646963943532 is 2353493696463.

It is a happy number.

3646963943532 is a `hidden beast` number, since 3 + 6 + 4 + 6 + 9 + 6 + 3 + 94 + 3 + 532 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 3646963943532.

It is not an unprimeable number, because it can be changed into a prime (3646963943531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 829418758 + ... + 829423154.

It is an arithmetic number, because the mean of its divisors is an integer number (21330818964).

Almost surely, 2^{3646963943532} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3646963943532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6143275861632).

3646963943532 is an abundant number, since it is smaller than the sum of its proper divisors (8639587779732).

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

3646963943532 is a wasteful number, since it uses less digits than its factorization.

3646963943532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778 (or 4773 counting only the distinct ones).

The product of its digits is 226748160, while the sum is 63.

The spelling of 3646963943532 in words is "three trillion, six hundred forty-six billion, nine hundred sixty-three million, nine hundred forty-three thousand, five hundred thirty-two".