16216572066637 has 2 divisors, whose sum is σ = 16216572066638. Its totient is φ = 16216572066636.

The previous prime is 16216572066613. The next prime is 16216572066689. The reversal of 16216572066637 is 73666027561261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15906489030436 + 310083036201 = 3988294^2 + 556851^2 .

It is a cyclic number.

It is not a de Polignac number, because 16216572066637 - 2⁷ = 16216572066509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16216572466637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108286033318 + 8108286033319.

It is an arithmetic number, because the mean of its divisors is an integer number (8108286033319).

Almost surely, 2^{16216572066637} is an apocalyptic number.

It is an amenable number.

16216572066637 is a deficient number, since it is larger than the sum of its proper divisors (1).

16216572066637 is an equidigital number, since it uses as much as digits as its factorization.

16216572066637 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 58.

The spelling of 16216572066637 in words is "sixteen trillion, two hundred sixteen billion, five hundred seventy-two million, sixty-six thousand, six hundred thirty-seven".