63861844896 has 216 divisors, whose sum is σ = 194994579780. Its totient is φ = 19809681408.

The previous prime is 63861844883. The next prime is 63861844897. The reversal of 63861844896 is 69844816836.

63861844896 is a `hidden beast` number, since 6 + 3 + 8 + 618 + 4 + 4 + 8 + 9 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62390048400 + 1471796496 = 249780^2 + 38364^2 .

It is a super-2 number, since 2×63861844896² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (63861844897) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5631360 + ... + 5642688.

Almost surely, 2^63861844896 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 63861844896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97497289890).

63861844896 is an abundant number, since it is smaller than the sum of its proper divisors (131132734884).

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

63861844896 is a wasteful number, since it uses less digits than its factorization.

63861844896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11428 (or 11394 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 63.

The spelling of 63861844896 in words is "sixty-three billion, eight hundred sixty-one million, eight hundred forty-four thousand, eight hundred ninety-six".