168044522901 has 4 divisors (see below), whose sum is σ = 224059363872. Its totient is φ = 112029681932.

The previous prime is 168044522881. The next prime is 168044522903. The reversal of 168044522901 is 109225440861.

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.

It is a cyclic number.

It is not a de Polignac number, because 168044522901 - 2²⁹ = 167507651989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168044522903) 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, 28007420481 + ... + 28007420486.

It is an arithmetic number, because the mean of its divisors is an integer number (56014840968).

Almost surely, 2^168044522901 is an apocalyptic number.

It is an amenable number.

168044522901 is a deficient number, since it is larger than the sum of its proper divisors (56014840971).

168044522901 is an equidigital number, since it uses as much as digits as its factorization.

168044522901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56014840970.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 168044522901 in words is "one hundred sixty-eight billion, forty-four million, five hundred twenty-two thousand, nine hundred one".