63978827400 has 192 divisors, whose sum is σ = 220510291200. Its totient is φ = 17050279680.

The previous prime is 63978827399. The next prime is 63978827413. The reversal of 63978827400 is 472887936.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12379617 + ... + 12384783.

It is an arithmetic number, because the mean of its divisors is an integer number (1148491100).

Almost surely, 2^63978827400 is an apocalyptic number.

63978827400 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 63978827400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110255145600).

63978827400 is an abundant number, since it is smaller than the sum of its proper divisors (156531463800).

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

63978827400 is a wasteful number, since it uses less digits than its factorization.

63978827400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7485 (or 7470 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 63978827400 in words is "sixty-three billion, nine hundred seventy-eight million, eight hundred twenty-seven thousand, four hundred".