16424693785 has 4 divisors (see below), whose sum is σ = 19709632548. Its totient is φ = 13139755024.

The previous prime is 16424693771. The next prime is 16424693797. The reversal of 16424693785 is 58739642461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58739642461 = 6703 ⋅8763187.

It can be written as a sum of positive squares in 2 ways, for example, as 9266180121 + 7158513664 = 96261^2 + 84608^2 .

It is a cyclic number.

It is not a de Polignac number, because 16424693785 - 2¹¹ = 16424691737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642469374 + ... + 1642469383.

It is an arithmetic number, because the mean of its divisors is an integer number (4927408137).

Almost surely, 2^16424693785 is an apocalyptic number.

It is an amenable number.

16424693785 is a deficient number, since it is larger than the sum of its proper divisors (3284938763).

16424693785 is an equidigital number, since it uses as much as digits as its factorization.

16424693785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284938762.

The product of its digits is 8709120, while the sum is 55.

The spelling of 16424693785 in words is "sixteen billion, four hundred twenty-four million, six hundred ninety-three thousand, seven hundred eighty-five".