168408320434 has 4 divisors (see below), whose sum is σ = 252612480654. Its totient is φ = 84204160216.

The previous prime is 168408320417. The next prime is 168408320441. The reversal of 168408320434 is 434023804861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 166588871409 + 1819449025 = 408153^2 + 42655^2 .

It is a super-2 number, since 2×168408320434² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42102080107 + ... + 42102080110.

Almost surely, 2^168408320434 is an apocalyptic number.

168408320434 is a deficient number, since it is larger than the sum of its proper divisors (84204160220).

168408320434 is an equidigital number, since it uses as much as digits as its factorization.

168408320434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84204160219.

The product of its (nonzero) digits is 442368, while the sum is 43.

The spelling of 168408320434 in words is "one hundred sixty-eight billion, four hundred eight million, three hundred twenty thousand, four hundred thirty-four".