16600458649 has 2 divisors, whose sum is σ = 16600458650. Its totient is φ = 16600458648.

The previous prime is 16600458629. The next prime is 16600458683. The reversal of 16600458649 is 94685400661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15384681225 + 1215777424 = 124035^2 + 34868^2 .

It is an emirp because it is prime and its reverse (94685400661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16600458649 - 2⁷ = 16600458521 is a prime.

It is not a weakly prime, because it can be changed into another prime (16600458629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8300229324 + 8300229325.

It is an arithmetic number, because the mean of its divisors is an integer number (8300229325).

Almost surely, 2^16600458649 is an apocalyptic number.

It is an amenable number.

16600458649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16600458649 is an equidigital number, since it uses as much as digits as its factorization.

16600458649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 16600458649 in words is "sixteen billion, six hundred million, four hundred fifty-eight thousand, six hundred forty-nine".