168744874442 has 8 divisors (see below), whose sum is σ = 253244066436. Its totient is φ = 84330185632.

The previous prime is 168744874429. The next prime is 168744874489. The reversal of 168744874442 is 244478447861.

It can be written as a sum of positive squares in 2 ways, for example, as 135255508441 + 33489366001 = 367771^2 + 183001^2 .

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

It is a super-2 number, since 2×168744874442² (a number of 23 digits) contains 22 as substring.

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, 21120803 + ... + 21128790.

Almost surely, 2^168744874442 is an apocalyptic number.

168744874442 is a deficient number, since it is larger than the sum of its proper divisors (84499191994).

168744874442 is a wasteful number, since it uses less digits than its factorization.

168744874442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42251592.

The product of its digits is 38535168, while the sum is 59.

The spelling of 168744874442 in words is "one hundred sixty-eight billion, seven hundred forty-four million, eight hundred seventy-four thousand, four hundred forty-two".