16634743149 has 4 divisors (see below), whose sum is σ = 22179657536. Its totient is φ = 11089828764.

The previous prime is 16634743121. The next prime is 16634743193. The reversal of 16634743149 is 94134743661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16634743149 - 2⁹ = 16634742637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16634743098 and 16634743107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16634744149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2772457189 + ... + 2772457194.

It is an arithmetic number, because the mean of its divisors is an integer number (5544914384).

Almost surely, 2^16634743149 is an apocalyptic number.

It is an amenable number.

16634743149 is a deficient number, since it is larger than the sum of its proper divisors (5544914387).

16634743149 is an equidigital number, since it uses as much as digits as its factorization.

16634743149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5544914386.

The product of its digits is 1306368, while the sum is 48.

The spelling of 16634743149 in words is "sixteen billion, six hundred thirty-four million, seven hundred forty-three thousand, one hundred forty-nine".