161704553 has 8 divisors (see below), whose sum is σ = 166001088. Its totient is φ = 157432464.

The previous prime is 161704549. The next prime is 161704579. The reversal of 161704553 is 355407161.

161704553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161704553 - 2² = 161704549 is a prime.

It is a super-2 number, since 2×161704553² = 52296724921859618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161704523) 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, 7700 + ... + 19562.

It is an arithmetic number, because the mean of its divisors is an integer number (20750136).

Almost surely, 2^161704553 is an apocalyptic number.

It is an amenable number.

161704553 is a deficient number, since it is larger than the sum of its proper divisors (4296535).

161704553 is a wasteful number, since it uses less digits than its factorization.

161704553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12223.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 161704553 is about 12716.3105105215. The cubic root of 161704553 is about 544.8045793767.

The spelling of 161704553 in words is "one hundred sixty-one million, seven hundred four thousand, five hundred fifty-three".