63491679774720 has 384 divisors, whose sum is σ = 225743483347200. Its totient is φ = 16927333613568.

The previous prime is 63491679774703. The next prime is 63491679774779. The reversal of 63491679774720 is 2747797619436.

63491679774720 is a `hidden beast` number, since 6 + 3 + 4 + 9 + 1 + 67 + 97 + 7 + 472 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 1370488197 + ... + 1370534523.

It is an arithmetic number, because the mean of its divisors is an integer number (587873654550).

Almost surely, 2^{63491679774720} is an apocalyptic number.

63491679774720 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 63491679774720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112871741673600).

63491679774720 is an abundant number, since it is smaller than the sum of its proper divisors (162251803572480).

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

63491679774720 is a wasteful number, since it uses less digits than its factorization.

63491679774720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51320 (or 51294 counting only the distinct ones).

The product of its (nonzero) digits is 672126336, while the sum is 72.

The spelling of 63491679774720 in words is "sixty-three trillion, four hundred ninety-one billion, six hundred seventy-nine million, seven hundred seventy-four thousand, seven hundred twenty".