63990669120 has 224 divisors, whose sum is σ = 232578103296. Its totient is φ = 14602291200.

The previous prime is 63990669101. The next prime is 63990669133. The reversal of 63990669120 is 2196609936.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4232775 + ... + 4247865.

It is an arithmetic number, because the mean of its divisors is an integer number (1038295104).

Almost surely, 2^63990669120 is an apocalyptic number.

63990669120 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 63990669120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116289051648).

63990669120 is an abundant number, since it is smaller than the sum of its proper divisors (168587434176).

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

63990669120 is a wasteful number, since it uses less digits than its factorization.

63990669120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15749 (or 15739 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 51.

The spelling of 63990669120 in words is "sixty-three billion, nine hundred ninety million, six hundred sixty-nine thousand, one hundred twenty".