63980372820 has 384 divisors, whose sum is σ = 230759424000. Its totient is φ = 12873738240.

The previous prime is 63980372767. The next prime is 63980372839. The reversal of 63980372820 is 2827308936.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 63980372820.

It is a congruent number.

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 127 ways as a sum of consecutive naturals, for example, 62663910 + ... + 62664930.

It is an arithmetic number, because the mean of its divisors is an integer number (600936000).

Almost surely, 2^63980372820 is an apocalyptic number.

63980372820 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 63980372820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115379712000).

63980372820 is an abundant number, since it is smaller than the sum of its proper divisors (166779051180).

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

63980372820 is a wasteful number, since it uses less digits than its factorization.

63980372820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575 (or 1573 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 63980372820 in words is "sixty-three billion, nine hundred eighty million, three hundred seventy-two thousand, eight hundred twenty".