16506545647 has 2 divisors, whose sum is σ = 16506545648. Its totient is φ = 16506545646.

The previous prime is 16506545617. The next prime is 16506545683. The reversal of 16506545647 is 74654560561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16506545647 - 2²⁷ = 16372327919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16506545647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16506545617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253272823 + 8253272824.

It is an arithmetic number, because the mean of its divisors is an integer number (8253272824).

Almost surely, 2^16506545647 is an apocalyptic number.

16506545647 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506545647 is an equidigital number, since it uses as much as digits as its factorization.

16506545647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 16506545647 in words is "sixteen billion, five hundred six million, five hundred forty-five thousand, six hundred forty-seven".