63643268699136 has 1056 divisors, whose sum is σ = 226587462017280. Its totient is φ = 17457256857600.

The previous prime is 63643268699071. The next prime is 63643268699303. The reversal of 63643268699136 is 63199686234636.

63643268699136 is a `hidden beast` number, since 6 + 3 + 6 + 4 + 326 + 86 + 99 + 136 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9142830696 + ... + 9142837656.

Almost surely, 2^{63643268699136} 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 63643268699136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113293731008640).

63643268699136 is an abundant number, since it is smaller than the sum of its proper divisors (162944193318144).

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

63643268699136 is a wasteful number, since it uses less digits than its factorization.

63643268699136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7213 (or 7183 counting only the distinct ones).

The product of its digits is 1088391168, while the sum is 72.

The spelling of 63643268699136 in words is "sixty-three trillion, six hundred forty-three billion, two hundred sixty-eight million, six hundred ninety-nine thousand, one hundred thirty-six".