163758857361 has 16 divisors (see below), whose sum is σ = 238257028800. Its totient is φ = 99221822720.

The previous prime is 163758857341. The next prime is 163758857401.

It is a happy number.

163758857361 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 163758857361 - 2¹⁰ = 163758856337 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 163758857295 and 163758857304.

It is not an unprimeable number, because it can be changed into a prime (163758857341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520836 + ... + 773813.

It is an arithmetic number, because the mean of its divisors is an integer number (14891064300).

Almost surely, 2^163758857361 is an apocalyptic number.

163758857361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163758857361 is a deficient number, since it is larger than the sum of its proper divisors (74498171439).

163758857361 is a wasteful number, since it uses less digits than its factorization.

163758857361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298496.

The product of its digits is 25401600, while the sum is 60.

The spelling of 163758857361 in words is "one hundred sixty-three billion, seven hundred fifty-eight million, eight hundred fifty-seven thousand, three hundred sixty-one".