63523205808 has 160 divisors (see below), whose sum is σ = 170080542720. Its totient is φ = 20417429760.

The previous prime is 63523205789. The next prime is 63523205813. The reversal of 63523205808 is 80850232536.

It is a super-2 number, since 2×63523205808² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63523205808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64621285 + ... + 64622267.

It is an arithmetic number, because the mean of its divisors is an integer number (1063003392).

Almost surely, 2^63523205808 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 63523205808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85040271360).

63523205808 is an abundant number, since it is smaller than the sum of its proper divisors (106557336912).

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

63523205808 is a wasteful number, since it uses less digits than its factorization.

63523205808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 63523205808 in words is "sixty-three billion, five hundred twenty-three million, two hundred five thousand, eight hundred eight".