168352400642 has 8 divisors (see below), whose sum is σ = 252581346300. Its totient is φ = 84158618544.

The previous prime is 168352400641. The next prime is 168352400659. The reversal of 168352400642 is 246004253861.

It can be written as a sum of positive squares in 2 ways, for example, as 110608791241 + 57743609401 = 332579^2 + 240299^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 168352400642.

It is not an unprimeable number, because it can be changed into a prime (168352400641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8778917 + ... + 8798072.

Almost surely, 2^168352400642 is an apocalyptic number.

168352400642 is a deficient number, since it is larger than the sum of its proper divisors (84228945658).

168352400642 is a wasteful number, since it uses less digits than its factorization.

168352400642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17581780.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 168352400642 in words is "one hundred sixty-eight billion, three hundred fifty-two million, four hundred thousand, six hundred forty-two".