63878459904 has 240 divisors, whose sum is σ = 212124369600. Its totient is φ = 18127134720.

The previous prime is 63878459903. The next prime is 63878459923. The reversal of 63878459904 is 40995487836.

63878459904 is a `hidden beast` number, since 6 + 38 + 7 + 8 + 4 + 599 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (63878459903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4799499 + ... + 4812789.

It is an arithmetic number, because the mean of its divisors is an integer number (883851540).

Almost surely, 2^63878459904 is an apocalyptic number.

63878459904 is a gapful number since it is divisible by the number (64) 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 63878459904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106062184800).

63878459904 is an abundant number, since it is smaller than the sum of its proper divisors (148245909696).

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

63878459904 is a wasteful number, since it uses less digits than its factorization.

63878459904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13471 (or 13452 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 63878459904 in words is "sixty-three billion, eight hundred seventy-eight million, four hundred fifty-nine thousand, nine hundred four".