161605353 has 32 divisors (see below), whose sum is σ = 267869952. Its totient is φ = 84384000.

The previous prime is 161605333. The next prime is 161605357. The reversal of 161605353 is 353506161.

It is not a de Polignac number, because 161605353 - 2⁶ = 161605289 is a prime.

It is a super-2 number, since 2×161605353² = 52232580236509218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161605353.

It is not an unprimeable number, because it can be changed into a prime (161605357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24643 + ... + 30503.

It is an arithmetic number, because the mean of its divisors is an integer number (8370936).

Almost surely, 2^161605353 is an apocalyptic number.

161605353 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161605353 is a deficient number, since it is larger than the sum of its proper divisors (106264599).

161605353 is a wasteful number, since it uses less digits than its factorization.

161605353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 161605353 is about 12712.4094097067. The cubic root of 161605353 is about 544.6931505012.

The spelling of 161605353 in words is "one hundred sixty-one million, six hundred five thousand, three hundred fifty-three".