16749653985 has 16 divisors (see below), whose sum is σ = 29777162880. Its totient is φ = 8933148720.

The previous prime is 16749653983. The next prime is 16749654013. The reversal of 16749653985 is 58935694761.

16749653985 is a `hidden beast` number, since 1 + 6 + 7 + 4 + 96 + 539 + 8 + 5 = 666.

It is not a de Polignac number, because 16749653985 - 2¹ = 16749653983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16749653983) 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, 62035621 + ... + 62035890.

It is an arithmetic number, because the mean of its divisors is an integer number (1861072680).

Almost surely, 2^16749653985 is an apocalyptic number.

16749653985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16749653985 is a deficient number, since it is larger than the sum of its proper divisors (13027508895).

16749653985 is a wasteful number, since it uses less digits than its factorization.

16749653985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124071525 (or 124071519 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The spelling of 16749653985 in words is "sixteen billion, seven hundred forty-nine million, six hundred fifty-three thousand, nine hundred eighty-five".