16453445 has 4 divisors (see below), whose sum is σ = 19744140. Its totient is φ = 13162752.

The previous prime is 16453439. The next prime is 16453447. The reversal of 16453445 is 54435461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54435461 = 433 ⋅125717.

It can be written as a sum of positive squares in 2 ways, for example, as 7656289 + 8797156 = 2767^2 + 2966^2 .

It is a cyclic number.

It is not a de Polignac number, because 16453445 - 2⁴ = 16453429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16453447) 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, 1645340 + ... + 1645349.

It is an arithmetic number, because the mean of its divisors is an integer number (4936035).

Almost surely, 2^16453445 is an apocalyptic number.

It is an amenable number.

16453445 is a deficient number, since it is larger than the sum of its proper divisors (3290695).

16453445 is an equidigital number, since it uses as much as digits as its factorization.

16453445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290694.

The product of its digits is 28800, while the sum is 32.

The square root of 16453445 is about 4056.2846300525. The cubic root of 16453445 is about 254.3425071235.

The spelling of 16453445 in words is "sixteen million, four hundred fifty-three thousand, four hundred forty-five".