161722675 has 6 divisors (see below), whose sum is σ = 200536148. Its totient is φ = 129378120.

The previous prime is 161722643. The next prime is 161722697. The reversal of 161722675 is 576227161.

161722675 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161722675 - 2⁵ = 161722643 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3234429 + ... + 3234478.

Almost surely, 2^161722675 is an apocalyptic number.

161722675 is a deficient number, since it is larger than the sum of its proper divisors (38813473).

161722675 is an equidigital number, since it uses as much as digits as its factorization.

161722675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468917 (or 6468912 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 161722675 is about 12717.0230400043. The cubic root of 161722675 is about 544.8249304421.

It can be divided in two parts, 1617226 and 75, that added together give a triangular number (1617301 = T₁₇₉₈).

The spelling of 161722675 in words is "one hundred sixty-one million, seven hundred twenty-two thousand, six hundred seventy-five".