16506416970437 has 2 divisors, whose sum is σ = 16506416970438. Its totient is φ = 16506416970436.

The previous prime is 16506416970427. The next prime is 16506416970509. The reversal of 16506416970437 is 73407961460561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16501801942081 + 4615028356 = 4062241^2 + 67934^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506416970437 - 2¹² = 16506416966341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16506416970427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253208485218 + 8253208485219.

It is an arithmetic number, because the mean of its divisors is an integer number (8253208485219).

Almost surely, 2^{16506416970437} is an apocalyptic number.

It is an amenable number.

16506416970437 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506416970437 is an equidigital number, since it uses as much as digits as its factorization.

16506416970437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 59.

The spelling of 16506416970437 in words is "sixteen trillion, five hundred six billion, four hundred sixteen million, nine hundred seventy thousand, four hundred thirty-seven".