16791553 has 12 divisors (see below), whose sum is σ = 17623764. Its totient is φ = 15996000.

The previous prime is 16791547. The next prime is 16791557. The reversal of 16791553 is 35519761.

16791553 is nontrivially palindromic in base 2.

It can be written as a sum of positive squares in 2 ways, for example, as 15745024 + 1046529 = 3968^2 + 1023^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16791553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16791557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96975 + ... + 97147.

It is an arithmetic number, because the mean of its divisors is an integer number (1468647).

Almost surely, 2^16791553 is an apocalyptic number.

It is an amenable number.

16791553 is a deficient number, since it is larger than the sum of its proper divisors (832211).

16791553 is a wasteful number, since it uses less digits than its factorization.

16791553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 305 counting only the distinct ones).

The product of its digits is 28350, while the sum is 37.

The square root of 16791553 is about 4097.7497483375. The cubic root of 16791553 is about 256.0729009910.

The spelling of 16791553 in words is "sixteen million, seven hundred ninety-one thousand, five hundred fifty-three".