16506049213 has 2 divisors, whose sum is σ = 16506049214. Its totient is φ = 16506049212.

The previous prime is 16506049211. The next prime is 16506049249. The reversal of 16506049213 is 31294060561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9879763609 + 6626285604 = 99397^2 + 81402^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506049213 - 2¹ = 16506049211 is a prime.

Together with 16506049211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16506049211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253024606 + 8253024607.

It is an arithmetic number, because the mean of its divisors is an integer number (8253024607).

Almost surely, 2^16506049213 is an apocalyptic number.

It is an amenable number.

16506049213 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506049213 is an equidigital number, since it uses as much as digits as its factorization.

16506049213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 16506049213 in words is "sixteen billion, five hundred six million, forty-nine thousand, two hundred thirteen".