16641956 has 12 divisors (see below), whose sum is σ = 29522892. Its totient is φ = 8206848.

The previous prime is 16641943. The next prime is 16641973. The reversal of 16641956 is 65914661.

It can be written as a sum of positive squares in 2 ways, for example, as 11669056 + 4972900 = 3416^2 + 2230^2 .

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 28205 + ... + 28788.

It is an arithmetic number, because the mean of its divisors is an integer number (2460241).

Almost surely, 2^16641956 is an apocalyptic number.

It is an amenable number.

16641956 is a deficient number, since it is larger than the sum of its proper divisors (12880936).

16641956 is a wasteful number, since it uses less digits than its factorization.

16641956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57070 (or 57068 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 16641956 is about 4079.4553558043. The cubic root of 16641956 is about 255.3101749105.

It can be divided in two parts, 166 and 41956, that multiplied together give a palindrome (6964696).

The spelling of 16641956 in words is "sixteen million, six hundred forty-one thousand, nine hundred fifty-six".