4006643716537 has 96 divisors (see below), whose sum is σ = 5354280382464. Its totient is φ = 2959016860800.

The previous prime is 4006643716519. The next prime is 4006643716547. The reversal of 4006643716537 is 7356173466004.

It is not a de Polignac number, because 4006643716537 - 2²⁷ = 4006509498809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4006643716547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 666992788 + ... + 666998794.

It is an arithmetic number, because the mean of its divisors is an integer number (55773753984).

Almost surely, 2^{4006643716537} is an apocalyptic number.

It is an amenable number.

4006643716537 is a deficient number, since it is larger than the sum of its proper divisors (1347636665927).

4006643716537 is a wasteful number, since it uses less digits than its factorization.

4006643716537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539 (or 6532 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 4006643716537 in words is "four trillion, six billion, six hundred forty-three million, seven hundred sixteen thousand, five hundred thirty-seven".