168400447775 has 12 divisors (see below), whose sum is σ = 238647491952. Its totient is φ = 115474592640.

The previous prime is 168400447763. The next prime is 168400447801. The reversal of 168400447775 is 577744004861.

It is not a de Polignac number, because 168400447775 - 2¹⁴ = 168400431391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 481143962 + ... + 481144311.

It is an arithmetic number, because the mean of its divisors is an integer number (19887290996).

Almost surely, 2^168400447775 is an apocalyptic number.

168400447775 is a deficient number, since it is larger than the sum of its proper divisors (70247044177).

168400447775 is an equidigital number, since it uses as much as digits as its factorization.

168400447775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962288290 (or 962288285 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 53.

The spelling of 168400447775 in words is "one hundred sixty-eight billion, four hundred million, four hundred forty-seven thousand, seven hundred seventy-five".