16557453 has 20 divisors (see below), whose sum is σ = 26983968. Its totient is φ = 10034280.

The previous prime is 16557449. The next prime is 16557461. The reversal of 16557453 is 35475561.

It is not a de Polignac number, because 16557453 - 2² = 16557449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16557403) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8401 + ... + 10182.

Almost surely, 2^16557453 is an apocalyptic number.

It is an amenable number.

16557453 is a deficient number, since it is larger than the sum of its proper divisors (10426515).

16557453 is a wasteful number, since it uses less digits than its factorization.

16557453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18606 (or 18597 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 16557453 is about 4069.0850322892. The cubic root of 16557453 is about 254.8773112221.

The spelling of 16557453 in words is "sixteen million, five hundred fifty-seven thousand, four hundred fifty-three".