16001643716 has 12 divisors (see below), whose sum is σ = 28280133420. Its totient is φ = 7921605600.

The previous prime is 16001643689. The next prime is 16001643719. The reversal of 16001643716 is 61734610061.

It can be written as a sum of positive squares in 2 ways, for example, as 10742493316 + 5259150400 = 103646^2 + 72520^2 .

It is a super-2 number, since 2×16001643716² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16001643719) 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, 19803611 + ... + 19804418.

It is an arithmetic number, because the mean of its divisors is an integer number (2356677785).

Almost surely, 2^16001643716 is an apocalyptic number.

It is an amenable number.

16001643716 is a deficient number, since it is larger than the sum of its proper divisors (12278489704).

16001643716 is a wasteful number, since it uses less digits than its factorization.

16001643716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39608134 (or 39608132 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 16001643716 in words is "sixteen billion, one million, six hundred forty-three thousand, seven hundred sixteen".