161704222007 has 8 divisors (see below), whose sum is σ = 161939730432. Its totient is φ = 161468861400.

The previous prime is 161704221997. The next prime is 161704222049. The reversal of 161704222007 is 700222407161.

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

It is a cyclic number.

It is not a de Polignac number, because 161704222007 - 2³² = 157409254711 is a prime.

It is a super-2 number, since 2×161704222007² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161704222067) 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, 2254898 + ... + 2325504.

It is an arithmetic number, because the mean of its divisors is an integer number (20242466304).

Almost surely, 2^161704222007 is an apocalyptic number.

161704222007 is a deficient number, since it is larger than the sum of its proper divisors (235508425).

161704222007 is an equidigital number, since it uses as much as digits as its factorization.

161704222007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73909.

The product of its (nonzero) digits is 9408, while the sum is 32.

Adding to 161704222007 its reverse (700222407161), we get a palindrome (861926629168).

The spelling of 161704222007 in words is "one hundred sixty-one billion, seven hundred four million, two hundred twenty-two thousand, seven".