167640161 has 8 divisors (see below), whose sum is σ = 180651240. Its totient is φ = 154645632.

The previous prime is 167640149. The next prime is 167640167. The reversal of 167640161 is 161046761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 739600 + 166900561 = 860^2 + 12919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167640161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167640167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24071 + ... + 30243.

It is an arithmetic number, because the mean of its divisors is an integer number (22581405).

Almost surely, 2^167640161 is an apocalyptic number.

It is an amenable number.

167640161 is a deficient number, since it is larger than the sum of its proper divisors (13011079).

167640161 is a wasteful number, since it uses less digits than its factorization.

167640161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 167640161 is about 12947.5928650850. The cubic root of 167640161 is about 551.3905979093.

The spelling of 167640161 in words is "one hundred sixty-seven million, six hundred forty thousand, one hundred sixty-one".