63651487680 has 336 divisors, whose sum is σ = 239218012800. Its totient is φ = 15406110720.

The previous prime is 63651487661. The next prime is 63651487687. The reversal of 63651487680 is 8678415636.

63651487680 is a `hidden beast` number, since 6 + 36 + 51 + 487 + 6 + 80 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63651487687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27211951 + ... + 27214289.

Almost surely, 2^63651487680 is an apocalyptic number.

63651487680 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 63651487680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119609006400).

63651487680 is an abundant number, since it is smaller than the sum of its proper divisors (175566525120).

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

63651487680 is a wasteful number, since it uses less digits than its factorization.

63651487680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232 (or 3219 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 63651487680 in words is "sixty-three billion, six hundred fifty-one million, four hundred eighty-seven thousand, six hundred eighty".