161602453 has 4 divisors (see below), whose sum is σ = 162505440. Its totient is φ = 160699468.

The previous prime is 161602451. The next prime is 161602477. The reversal of 161602453 is 354206161.

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 a cyclic number.

It is not a de Polignac number, because 161602453 - 2¹ = 161602451 is a prime.

It is a super-2 number, since 2×161602453² = 52230705631234418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161602451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451225 + ... + 451582.

It is an arithmetic number, because the mean of its divisors is an integer number (40626360).

Almost surely, 2^161602453 is an apocalyptic number.

It is an amenable number.

161602453 is a deficient number, since it is larger than the sum of its proper divisors (902987).

161602453 is an equidigital number, since it uses as much as digits as its factorization.

161602453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902986.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 161602453 is about 12712.2953474186. The cubic root of 161602453 is about 544.6898923179.

The spelling of 161602453 in words is "one hundred sixty-one million, six hundred two thousand, four hundred fifty-three".