168591680761 has 4 divisors (see below), whose sum is σ = 192676206592. Its totient is φ = 144507154932.

The previous prime is 168591680759. The next prime is 168591680791. The reversal of 168591680761 is 167086195861.

168591680761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 167086195861 = 13 ⋅12852784297.

It is not a de Polignac number, because 168591680761 - 2¹ = 168591680759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168591680696 and 168591680705.

It is not an unprimeable number, because it can be changed into a prime (168591680711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12042262905 + ... + 12042262918.

It is an arithmetic number, because the mean of its divisors is an integer number (48169051648).

Almost surely, 2^168591680761 is an apocalyptic number.

It is an amenable number.

168591680761 is a deficient number, since it is larger than the sum of its proper divisors (24084525831).

168591680761 is an equidigital number, since it uses as much as digits as its factorization.

168591680761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24084525830.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 168591680761 in words is "one hundred sixty-eight billion, five hundred ninety-one million, six hundred eighty thousand, seven hundred sixty-one".