167143349721 has 4 divisors (see below), whose sum is σ = 222857799632. Its totient is φ = 111428899812.

The previous prime is 167143349719. The next prime is 167143349759. The reversal of 167143349721 is 127943341761.

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 not a de Polignac number, because 167143349721 - 2¹ = 167143349719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167143349761) 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, 27857224951 + ... + 27857224956.

It is an arithmetic number, because the mean of its divisors is an integer number (55714449908).

Almost surely, 2^167143349721 is an apocalyptic number.

It is an amenable number.

167143349721 is a deficient number, since it is larger than the sum of its proper divisors (55714449911).

167143349721 is an equidigital number, since it uses as much as digits as its factorization.

167143349721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55714449910.

The product of its digits is 762048, while the sum is 48.

The spelling of 167143349721 in words is "one hundred sixty-seven billion, one hundred forty-three million, three hundred forty-nine thousand, seven hundred twenty-one".