16505450727 has 16 divisors (see below), whose sum is σ = 23491825920. Its totient is φ = 10277668800.

The previous prime is 16505450719. The next prime is 16505450749. The reversal of 16505450727 is 72705450561.

It is a happy number.

It is not a de Polignac number, because 16505450727 - 2³ = 16505450719 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505450707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2035174 + ... + 2043267.

It is an arithmetic number, because the mean of its divisors is an integer number (1468239120).

Almost surely, 2^16505450727 is an apocalyptic number.

16505450727 is a deficient number, since it is larger than the sum of its proper divisors (6986375193).

16505450727 is a wasteful number, since it uses less digits than its factorization.

16505450727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078534.

The product of its (nonzero) digits is 294000, while the sum is 42.

The spelling of 16505450727 in words is "sixteen billion, five hundred five million, four hundred fifty thousand, seven hundred twenty-seven".