161605355053 has 8 divisors (see below), whose sum is σ = 165630792800. Its totient is φ = 157592061648.

The previous prime is 161605354991. The next prime is 161605355083. The reversal of 161605355053 is 350553506161.

It is a happy number.

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 161605355053 - 2⁹ = 161605354541 is a prime.

It is a super-3 number, since 3×161605355053³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161605354997 and 161605355015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161605355083) 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, 3009138 + ... + 3062371.

It is an arithmetic number, because the mean of its divisors is an integer number (20703849100).

Almost surely, 2^161605355053 is an apocalyptic number.

It is an amenable number.

161605355053 is a deficient number, since it is larger than the sum of its proper divisors (4025437747).

161605355053 is an equidigital number, since it uses as much as digits as its factorization.

161605355053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6072171.

The product of its (nonzero) digits is 202500, while the sum is 40.

The spelling of 161605355053 in words is "one hundred sixty-one billion, six hundred five million, three hundred fifty-five thousand, fifty-three".