16181804204955 has 40 divisors (see below), whose sum is σ = 29007676964112. Its totient is φ = 8630207923392.

The previous prime is 16181804204939. The next prime is 16181804204977. The reversal of 16181804204955 is 55940240818161.

16181804204955 is a `hidden beast` number, since 1 + 61 + 81 + 80 + 420 + 4 + 9 + 5 + 5 = 666.

It is not a de Polignac number, because 16181804204955 - 2⁴ = 16181804204939 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 67948269 + ... + 68186001.

Almost surely, 2^{16181804204955} is an apocalyptic number.

16181804204955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16181804204955 is a deficient number, since it is larger than the sum of its proper divisors (12825872759157).

16181804204955 is a wasteful number, since it uses less digits than its factorization.

16181804204955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405817 (or 405808 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The spelling of 16181804204955 in words is "sixteen trillion, one hundred eighty-one billion, eight hundred four million, two hundred four thousand, nine hundred fifty-five".