16611157 has 2 divisors, whose sum is σ = 16611158. Its totient is φ = 16611156.

The previous prime is 16611151. The next prime is 16611173. The reversal of 16611157 is 75111661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12773476 + 3837681 = 3574^2 + 1959^2 .

It is a cyclic number.

It is not a de Polignac number, because 16611157 - 2¹⁹ = 16086869 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16611151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305578 + 8305579.

It is an arithmetic number, because the mean of its divisors is an integer number (8305579).

Almost surely, 2^16611157 is an apocalyptic number.

It is an amenable number.

16611157 is a deficient number, since it is larger than the sum of its proper divisors (1).

16611157 is an equidigital number, since it uses as much as digits as its factorization.

16611157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 28.

The square root of 16611157 is about 4075.6787164839. The cubic root of 16611157 is about 255.1525781734.

The spelling of 16611157 in words is "sixteen million, six hundred eleven thousand, one hundred fifty-seven".