63178065720 has 1152 divisors, whose sum is σ = 279649843200. Its totient is φ = 12671769600.

The previous prime is 63178065701. The next prime is 63178065761. The reversal of 63178065720 is 2756087136.

63178065720 is a `hidden beast` number, since 6 + 3 + 1 + 78 + 0 + 6 + 572 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 162411286 + ... + 162411674.

It is an arithmetic number, because the mean of its divisors is an integer number (242751600).

Almost surely, 2^63178065720 is an apocalyptic number.

63178065720 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 63178065720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139824921600).

63178065720 is an abundant number, since it is smaller than the sum of its proper divisors (216471777480).

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

63178065720 is a wasteful number, since it uses less digits than its factorization.

63178065720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 63178065720 in words is "sixty-three billion, one hundred seventy-eight million, sixty-five thousand, seven hundred twenty".