168388444121353 has 8 divisors (see below), whose sum is σ = 170696503501128. Its totient is φ = 166080421724544.

The previous prime is 168388444121327. The next prime is 168388444121377. The reversal of 168388444121353 is 353121444883861.

168388444121353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16398677022784 + 151989767098569 = 4049528^2 + 12328413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168388444121353 - 2²⁵ = 168388410566921 is a prime.

It is a super-2 number, since 2×168388444121353² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168388444121291 and 168388444121300.

It is not an unprimeable number, because it can be changed into a prime (168388444121753) 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, 14326 + ... + 18351487.

It is an arithmetic number, because the mean of its divisors is an integer number (21337062937641).

Almost surely, 2^{168388444121353} is an apocalyptic number.

It is an amenable number.

168388444121353 is a deficient number, since it is larger than the sum of its proper divisors (2308059379775).

168388444121353 is a wasteful number, since it uses less digits than its factorization.

168388444121353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18491483.

The product of its digits is 53084160, while the sum is 61.

The spelling of 168388444121353 in words is "one hundred sixty-eight trillion, three hundred eighty-eight billion, four hundred forty-four million, one hundred twenty-one thousand, three hundred fifty-three".