16651542671 has 2 divisors, whose sum is σ = 16651542672. Its totient is φ = 16651542670.

The previous prime is 16651542637. The next prime is 16651542701. The reversal of 16651542671 is 17624515661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16651542671 - 2²⁶ = 16584433807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16651542371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8325771335 + 8325771336.

It is an arithmetic number, because the mean of its divisors is an integer number (8325771336).

Almost surely, 2^16651542671 is an apocalyptic number.

16651542671 is a deficient number, since it is larger than the sum of its proper divisors (1).

16651542671 is an equidigital number, since it uses as much as digits as its factorization.

16651542671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 44.

The spelling of 16651542671 in words is "sixteen billion, six hundred fifty-one million, five hundred forty-two thousand, six hundred seventy-one".