163723851840 has 112 divisors (see below), whose sum is σ = 529631379648. Its totient is φ = 42835912704.

The previous prime is 163723851799. The next prime is 163723851869. The reversal of 163723851840 is 48158327361.

It is a super-2 number, since 2×163723851840² (a number of 23 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 163723851840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1558042 + ... + 1659801.

It is an arithmetic number, because the mean of its divisors is an integer number (4728851604).

Almost surely, 2^163723851840 is an apocalyptic number.

163723851840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163723851840 is an abundant number, since it is smaller than the sum of its proper divisors (365907527808).

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

163723851840 is a wasteful number, since it uses less digits than its factorization.

163723851840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217916 (or 3217906 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 163723851840 in words is "one hundred sixty-three billion, seven hundred twenty-three million, eight hundred fifty-one thousand, eight hundred forty".