16557541 has 48 divisors (see below), whose sum is σ = 24131520. Its totient is φ = 11128320.

The previous prime is 16557533. The next prime is 16557577. The reversal of 16557541 is 14575561.

It is not a de Polignac number, because 16557541 - 2³ = 16557533 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16557497 and 16557506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16557511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119050 + ... + 119188.

It is an arithmetic number, because the mean of its divisors is an integer number (502740).

Almost surely, 2^16557541 is an apocalyptic number.

16557541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16557541 is a deficient number, since it is larger than the sum of its proper divisors (7573979).

16557541 is a wasteful number, since it uses less digits than its factorization.

16557541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 187 counting only the distinct ones).

The product of its digits is 21000, while the sum is 34.

The square root of 16557541 is about 4069.0958455165. The cubic root of 16557541 is about 254.8777627643.

The spelling of 16557541 in words is "sixteen million, five hundred fifty-seven thousand, five hundred forty-one".