63911888040 has 512 divisors, whose sum is σ = 262318694400. Its totient is φ = 12026327040.

The previous prime is 63911888023. The next prime is 63911888063. The reversal of 63911888040 is 4088811936.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6361341 + ... + 6371379.

It is an arithmetic number, because the mean of its divisors is an integer number (512341200).

Almost surely, 2^63911888040 is an apocalyptic number.

63911888040 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 63911888040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131159347200).

63911888040 is an abundant number, since it is smaller than the sum of its proper divisors (198406806360).

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

63911888040 is a wasteful number, since it uses less digits than its factorization.

63911888040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10137 (or 10133 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

It can be divided in two parts, 6391 and 1888040, that added together give a triangular number (1894431 = T₁₉₄₆).

The spelling of 63911888040 in words is "sixty-three billion, nine hundred eleven million, eight hundred eighty-eight thousand, forty".