63988288936 has 64 divisors (see below), whose sum is σ = 141119858880. Its totient is φ = 26816494080.

The previous prime is 63988288879. The next prime is 63988288961.

63988288936 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×63988288936² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 947775 + ... + 1013041.

It is an arithmetic number, because the mean of its divisors is an integer number (2204997795).

Almost surely, 2^63988288936 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 63988288936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70559929440).

63988288936 is an abundant number, since it is smaller than the sum of its proper divisors (77131569944).

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

63988288936 is a wasteful number, since it uses less digits than its factorization.

63988288936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66154 (or 66150 counting only the distinct ones).

The product of its digits is 214990848, while the sum is 70.

The spelling of 63988288936 in words is "sixty-three billion, nine hundred eighty-eight million, two hundred eighty-eight thousand, nine hundred thirty-six".