163878764544 has 384 divisors, whose sum is σ = 535872879360. Its totient is φ = 49633689600.

The previous prime is 163878764531. The next prime is 163878764579. The reversal of 163878764544 is 445467878361.

163878764544 is a `hidden beast` number, since 1 + 6 + 3 + 8 + 7 + 87 + 6 + 4 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87587929 + ... + 87589799.

It is an arithmetic number, because the mean of its divisors is an integer number (1395502290).

Almost surely, 2^163878764544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163878764544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267936439680).

163878764544 is an abundant number, since it is smaller than the sum of its proper divisors (371994114816).

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

163878764544 is an frugal number, since it uses more digits than its factorization.

163878764544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927 (or 1887 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 63.

The spelling of 163878764544 in words is "one hundred sixty-three billion, eight hundred seventy-eight million, seven hundred sixty-four thousand, five hundred forty-four".