163780056 has 256 divisors, whose sum is σ = 538444800. Its totient is φ = 46189440.

The previous prime is 163780051. The next prime is 163780103. The reversal of 163780056 is 650087361.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 163780056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163780051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4426470 + ... + 4426506.

It is an arithmetic number, because the mean of its divisors is an integer number (2103300).

Almost surely, 2^163780056 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 163780056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269222400).

163780056 is an abundant number, since it is smaller than the sum of its proper divisors (374664744).

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

163780056 is a wasteful number, since it uses less digits than its factorization.

163780056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 163780056 is about 12797.6582232844. The cubic root of 163780056 is about 547.1255612038.

The spelling of 163780056 in words is "one hundred sixty-three million, seven hundred eighty thousand, fifty-six".