16623956 has 6 divisors (see below), whose sum is σ = 29091930. Its totient is φ = 8311976.

The previous prime is 16623949. The next prime is 16623961. The reversal of 16623956 is 65932661.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 8213956 = 2900^2 + 2866^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077991 + ... + 2077998.

It is an arithmetic number, because the mean of its divisors is an integer number (4848655).

Almost surely, 2^16623956 is an apocalyptic number.

It is an amenable number.

16623956 is a deficient number, since it is larger than the sum of its proper divisors (12467974).

16623956 is a wasteful number, since it uses less digits than its factorization.

16623956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155993 (or 4155991 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 16623956 is about 4077.2485820710. The cubic root of 16623956 is about 255.2180935668.

The spelling of 16623956 in words is "sixteen million, six hundred twenty-three thousand, nine hundred fifty-six".