16651657943 has 2 divisors, whose sum is σ = 16651657944. Its totient is φ = 16651657942.

The previous prime is 16651657861. The next prime is 16651657961. The reversal of 16651657943 is 34975615661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16651657943 - 2¹⁰ = 16651656919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16651657643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8325828971 + 8325828972.

It is an arithmetic number, because the mean of its divisors is an integer number (8325828972).

Almost surely, 2^16651657943 is an apocalyptic number.

16651657943 is a deficient number, since it is larger than the sum of its proper divisors (1).

16651657943 is an equidigital number, since it uses as much as digits as its factorization.

16651657943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 53.

The spelling of 16651657943 in words is "sixteen billion, six hundred fifty-one million, six hundred fifty-seven thousand, nine hundred forty-three".