163123420520 has 16 divisors (see below), whose sum is σ = 367027696260. Its totient is φ = 65249368192.

The previous prime is 163123420507. The next prime is 163123420567. The reversal of 163123420520 is 25024321361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 155799141796 + 7324278724 = 394714^2 + 85582^2 .

It is a super-3 number, since 3×163123420520³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2039042717 + ... + 2039042796.

Almost surely, 2^163123420520 is an apocalyptic number.

163123420520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163123420520 is an abundant number, since it is smaller than the sum of its proper divisors (203904275740).

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

163123420520 is a wasteful number, since it uses less digits than its factorization.

163123420520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078085524 (or 4078085520 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 163123420520 its reverse (25024321361), we get a palindrome (188147741881).

The spelling of 163123420520 in words is "one hundred sixty-three billion, one hundred twenty-three million, four hundred twenty thousand, five hundred twenty".