63440002080 has 1728 divisors, whose sum is σ = 295138142208. Its totient is φ = 12262440960.

The previous prime is 63440002051. The next prime is 63440002081. The reversal of 63440002080 is 8020004436.

63440002080 is a `hidden beast` number, since 634 + 4 + 0 + 0 + 0 + 20 + 8 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (63440002081) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 654020592 + ... + 654020688.

It is an arithmetic number, because the mean of its divisors is an integer number (170797536).

Almost surely, 2^63440002080 is an apocalyptic number.

63440002080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63440002080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147569071104).

63440002080 is an abundant number, since it is smaller than the sum of its proper divisors (231698140128).

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

63440002080 is a wasteful number, since it uses less digits than its factorization.

63440002080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The spelling of 63440002080 in words is "sixty-three billion, four hundred forty million, two thousand, eighty".