16649041071 has 64 divisors (see below), whose sum is σ = 25473351680. Its totient is φ = 9598072320.

The previous prime is 16649041037. The next prime is 16649041121. The reversal of 16649041071 is 17014094661.

It is not a de Polignac number, because 16649041071 - 2¹⁹ = 16648516783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16649041021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9974625 + ... + 9976293.

It is an arithmetic number, because the mean of its divisors is an integer number (398021120).

Almost surely, 2^16649041071 is an apocalyptic number.

16649041071 is a deficient number, since it is larger than the sum of its proper divisors (8824310609).

16649041071 is a wasteful number, since it uses less digits than its factorization.

16649041071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 16649041071 in words is "sixteen billion, six hundred forty-nine million, forty-one thousand, seventy-one".