16642707849 has 40 divisors (see below), whose sum is σ = 25414646400. Its totient is φ = 10848661344.

The previous prime is 16642707847. The next prime is 16642707857. The reversal of 16642707849 is 94870724661.

It is not a de Polignac number, because 16642707849 - 2¹ = 16642707847 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16642707795 and 16642707804.

It is not an unprimeable number, because it can be changed into a prime (16642707847) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7418722 + ... + 7420964.

It is an arithmetic number, because the mean of its divisors is an integer number (635366160).

Almost surely, 2^16642707849 is an apocalyptic number.

It is an amenable number.

16642707849 is a deficient number, since it is larger than the sum of its proper divisors (8771938551).

16642707849 is a wasteful number, since it uses less digits than its factorization.

16642707849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251 (or 4242 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 16642707849 in words is "sixteen billion, six hundred forty-two million, seven hundred seven thousand, eight hundred forty-nine".