16116555 has 32 divisors (see below), whose sum is σ = 31739904. Its totient is φ = 6800256.

The previous prime is 16116539. The next prime is 16116563. The reversal of 16116555 is 55561161.

It is not a de Polignac number, because 16116555 - 2⁴ = 16116539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4539 + ... + 7268.

It is an arithmetic number, because the mean of its divisors is an integer number (991872).

Almost surely, 2^16116555 is an apocalyptic number.

16116555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16116555 is a deficient number, since it is larger than the sum of its proper divisors (15623349).

16116555 is a wasteful number, since it uses less digits than its factorization.

16116555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11835.

The product of its digits is 4500, while the sum is 30.

The square root of 16116555 is about 4014.5429378698. The cubic root of 16116555 is about 252.5946055974.

The spelling of 16116555 in words is "sixteen million, one hundred sixteen thousand, five hundred fifty-five".