161653341 has 4 divisors (see below), whose sum is σ = 215537792. Its totient is φ = 107768892.

The previous prime is 161653309. The next prime is 161653381. The reversal of 161653341 is 143356161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161653341 - 2⁵ = 161653309 is a prime.

It is a super-2 number, since 2×161653341² = 52263605312924562, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161653299 and 161653308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161653301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26942221 + ... + 26942226.

It is an arithmetic number, because the mean of its divisors is an integer number (53884448).

Almost surely, 2^161653341 is an apocalyptic number.

It is an amenable number.

161653341 is a deficient number, since it is larger than the sum of its proper divisors (53884451).

161653341 is an equidigital number, since it uses as much as digits as its factorization.

161653341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53884450.

The product of its digits is 6480, while the sum is 30.

The square root of 161653341 is about 12714.2967166887. The cubic root of 161653341 is about 544.7470599119.

The spelling of 161653341 in words is "one hundred sixty-one million, six hundred fifty-three thousand, three hundred forty-one".