16643046541 has 4 divisors (see below), whose sum is σ = 18156050784. Its totient is φ = 15130042300.

The previous prime is 16643046449. The next prime is 16643046559. The reversal of 16643046541 is 14564034661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16643046541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16643046494 and 16643046503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16643046571) 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, 756502105 + ... + 756502126.

It is an arithmetic number, because the mean of its divisors is an integer number (4539012696).

Almost surely, 2^16643046541 is an apocalyptic number.

16643046541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16643046541 is a deficient number, since it is larger than the sum of its proper divisors (1513004243).

16643046541 is a wasteful number, since it uses less digits than its factorization.

16643046541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513004242.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 16643046541 in words is "sixteen billion, six hundred forty-three million, forty-six thousand, five hundred forty-one".