16554434505 has 64 divisors (see below), whose sum is σ = 32165849088. Its totient is φ = 7097195520.

The previous prime is 16554434497. The next prime is 16554434509. The reversal of 16554434505 is 50543445561.

It is not a de Polignac number, because 16554434505 - 2³ = 16554434497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16554434509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 488770 + ... + 521540.

It is an arithmetic number, because the mean of its divisors is an integer number (502591392).

Almost surely, 2^16554434505 is an apocalyptic number.

16554434505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16554434505 is a deficient number, since it is larger than the sum of its proper divisors (15611414583).

16554434505 is a wasteful number, since it uses less digits than its factorization.

16554434505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33086.

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 16554434505 in words is "sixteen billion, five hundred fifty-four million, four hundred thirty-four thousand, five hundred five".