167109181901 has 4 divisors (see below), whose sum is σ = 172499800704. Its totient is φ = 161718563100.

The previous prime is 167109181891. The next prime is 167109181903. The reversal of 167109181901 is 109181901761.

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 a de Polignac number, because none of the positive numbers 2^k-167109181901 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 (167109181903) 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, 2695309355 + ... + 2695309416.

It is an arithmetic number, because the mean of its divisors is an integer number (43124950176).

Almost surely, 2^167109181901 is an apocalyptic number.

It is an amenable number.

167109181901 is a deficient number, since it is larger than the sum of its proper divisors (5390618803).

167109181901 is an equidigital number, since it uses as much as digits as its factorization.

167109181901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5390618802.

The product of its (nonzero) digits is 27216, while the sum is 44.

The spelling of 167109181901 in words is "one hundred sixty-seven billion, one hundred nine million, one hundred eighty-one thousand, nine hundred one".