63936407808 has 720 divisors, whose sum is σ = 242432920576. Its totient is φ = 16303472640.

The previous prime is 63936407807. The next prime is 63936407809. The reversal of 63936407808 is 80870463936.

It is an interprime number because it is at equal distance from previous prime (63936407807) and next prime (63936407809).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (63936407807) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 58495710 + ... + 58496802.

Almost surely, 2^63936407808 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 63936407808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121216460288).

63936407808 is an abundant number, since it is smaller than the sum of its proper divisors (178496512768).

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

63936407808 is a wasteful number, since it uses less digits than its factorization.

63936407808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 63936407808 in words is "sixty-three billion, nine hundred thirty-six million, four hundred seven thousand, eight hundred eight".