16149681009 has 96 divisors (see below), whose sum is σ = 31117532160. Its totient is φ = 7817212800.

The previous prime is 16149680983. The next prime is 16149681071. The reversal of 16149681009 is 90018694161.

It is not a de Polignac number, because 16149681009 - 2⁹ = 16149680497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16149681089) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 793134 + ... + 813240.

It is an arithmetic number, because the mean of its divisors is an integer number (324140960).

Almost surely, 2^16149681009 is an apocalyptic number.

16149681009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16149681009 is a deficient number, since it is larger than the sum of its proper divisors (14967851151).

16149681009 is a wasteful number, since it uses less digits than its factorization.

16149681009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20211 (or 20208 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 16149681009 in words is "sixteen billion, one hundred forty-nine million, six hundred eighty-one thousand, nine".