63797797440 has 1008 divisors, whose sum is σ = 255822053760. Its totient is φ = 14549483520.

The previous prime is 63797797433. The next prime is 63797797451. The reversal of 63797797440 is 4479779736.

63797797440 is a `hidden beast` number, since 6 + 37 + 9 + 77 + 97 + 440 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 458976891 + ... + 458977029.

It is an arithmetic number, because the mean of its divisors is an integer number (253791720).

Almost surely, 2^63797797440 is an apocalyptic number.

63797797440 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 63797797440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127911026880).

63797797440 is an abundant number, since it is smaller than the sum of its proper divisors (192024256320).

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

63797797440 is a wasteful number, since it uses less digits than its factorization.

63797797440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 56010528, while the sum is 63.

The spelling of 63797797440 in words is "sixty-three billion, seven hundred ninety-seven million, seven hundred ninety-seven thousand, four hundred forty".