168421751711 has 4 divisors (see below), whose sum is σ = 175744436592. Its totient is φ = 161099066832.

The previous prime is 168421751683. The next prime is 168421751731. The reversal of 168421751711 is 117157124861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117157124861 = 7 ⋅16736732123.

It is a cyclic number.

It is not a de Polignac number, because 168421751711 - 2¹⁰ = 168421750687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168421751731) 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, 3661342406 + ... + 3661342451.

It is an arithmetic number, because the mean of its divisors is an integer number (43936109148).

Almost surely, 2^168421751711 is an apocalyptic number.

168421751711 is a deficient number, since it is larger than the sum of its proper divisors (7322684881).

168421751711 is an equidigital number, since it uses as much as digits as its factorization.

168421751711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322684880.

The product of its digits is 94080, while the sum is 44.

The spelling of 168421751711 in words is "one hundred sixty-eight billion, four hundred twenty-one million, seven hundred fifty-one thousand, seven hundred eleven".