168512829212842 has 4 divisors (see below), whose sum is σ = 252769243819266. Its totient is φ = 84256414606420.

The previous prime is 168512829212753. The next prime is 168512829212911. The reversal of 168512829212842 is 248212928215861.

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., 136751951421801 + 31760877791041 = 11694099^2 + 5635679^2 .

It is a super-2 number, since 2×168512829212842² (a number of 29 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, 42128207303209 + ... + 42128207303212.

Almost surely, 2^{168512829212842} is an apocalyptic number.

168512829212842 is a deficient number, since it is larger than the sum of its proper divisors (84256414606424).

168512829212842 is an equidigital number, since it uses as much as digits as its factorization.

168512829212842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84256414606423.

The product of its digits is 17694720, while the sum is 61.

The spelling of 168512829212842 in words is "one hundred sixty-eight trillion, five hundred twelve billion, eight hundred twenty-nine million, two hundred twelve thousand, eight hundred forty-two".