168845631442 has 8 divisors (see below), whose sum is σ = 253656302796. Its totient is φ = 84293530512.

The previous prime is 168845631377. The next prime is 168845631467. The reversal of 168845631442 is 244136548861.

It can be written as a sum of positive squares in 2 ways, for example, as 150878641761 + 17966989681 = 388431^2 + 134041^2 .

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

It is a super-4 number, since 4×168845631442⁴ (a number of 46 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168845631442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64640973 + ... + 64643584.

Almost surely, 2^168845631442 is an apocalyptic number.

168845631442 is a deficient number, since it is larger than the sum of its proper divisors (84810671354).

168845631442 is a wasteful number, since it uses less digits than its factorization.

168845631442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129285212.

The product of its digits is 4423680, while the sum is 52.

The spelling of 168845631442 in words is "one hundred sixty-eight billion, eight hundred forty-five million, six hundred thirty-one thousand, four hundred forty-two".