163442780416 has 72 divisors (see below), whose sum is σ = 327749022720. Its totient is φ = 81346123776.

The previous prime is 163442780411. The next prime is 163442780437. The reversal of 163442780416 is 614087244361.

It is a super-2 number, since 2×163442780416² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163442780411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60690366 + ... + 60693058.

It is an arithmetic number, because the mean of its divisors is an integer number (4552069760).

Almost surely, 2^163442780416 is an apocalyptic number.

163442780416 is a gapful number since it is divisible by the number (16) 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 163442780416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163874511360).

163442780416 is an abundant number, since it is smaller than the sum of its proper divisors (164306242304).

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

163442780416 is an equidigital number, since it uses as much as digits as its factorization.

163442780416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711 (or 3697 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 163442780416 in words is "one hundred sixty-three billion, four hundred forty-two million, seven hundred eighty thousand, four hundred sixteen".