163405380864 has 144 divisors (see below), whose sum is σ = 474694799040. Its totient is φ = 49489428480.

The previous prime is 163405380851. The next prime is 163405380913. The reversal of 163405380864 is 468083504361.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19502244 + ... + 19510620.

It is an arithmetic number, because the mean of its divisors is an integer number (3296491660).

Almost surely, 2^163405380864 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 163405380864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237347399520).

163405380864 is an abundant number, since it is smaller than the sum of its proper divisors (311289418176).

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

163405380864 is a wasteful number, since it uses less digits than its factorization.

163405380864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716 (or 10702 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 163405380864 in words is "one hundred sixty-three billion, four hundred five million, three hundred eighty thousand, eight hundred sixty-four".