168606873731 has 4 divisors (see below), whose sum is σ = 168609687264. Its totient is φ = 168604060200.

The previous prime is 168606873727. The next prime is 168606873769. The reversal of 168606873731 is 137378606861.

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

It is a cyclic number.

It is not a de Polignac number, because 168606873731 - 2² = 168606873727 is a prime.

It is a super-2 number, since 2×168606873731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168606873781) 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, 1314875 + ... + 1437396.

It is an arithmetic number, because the mean of its divisors is an integer number (42152421816).

Almost surely, 2^168606873731 is an apocalyptic number.

168606873731 is a deficient number, since it is larger than the sum of its proper divisors (2813533).

168606873731 is an equidigital number, since it uses as much as digits as its factorization.

168606873731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813532.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 168606873731 in words is "one hundred sixty-eight billion, six hundred six million, eight hundred seventy-three thousand, seven hundred thirty-one".