16549971216 has 40 divisors (see below), whose sum is σ = 42758810880. Its totient is φ = 5516048256.

The previous prime is 16549971197. The next prime is 16549971239. The reversal of 16549971216 is 61217994561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702606 + ... + 725778.

It is an arithmetic number, because the mean of its divisors is an integer number (1068970272).

Almost surely, 2^16549971216 is an apocalyptic number.

16549971216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16549971216 is an abundant number, since it is smaller than the sum of its proper divisors (26208839664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16549971216 is a wasteful number, since it uses less digits than its factorization.

16549971216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38063 (or 38057 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The spelling of 16549971216 in words is "sixteen billion, five hundred forty-nine million, nine hundred seventy-one thousand, two hundred sixteen".