16516640533 has 2 divisors, whose sum is σ = 16516640534. Its totient is φ = 16516640532.

The previous prime is 16516640507. The next prime is 16516640573. The reversal of 16516640533 is 33504661561.

It is an a-pointer prime, because the next prime (16516640573) can be obtained adding 16516640533 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16460120209 + 56520324 = 128297^2 + 7518^2 .

It is a cyclic number.

It is not a de Polignac number, because 16516640533 - 2²⁵ = 16483086101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16516640573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8258320266 + 8258320267.

It is an arithmetic number, because the mean of its divisors is an integer number (8258320267).

Almost surely, 2^16516640533 is an apocalyptic number.

It is an amenable number.

16516640533 is a deficient number, since it is larger than the sum of its proper divisors (1).

16516640533 is an equidigital number, since it uses as much as digits as its factorization.

16516640533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 16516640533 in words is "sixteen billion, five hundred sixteen million, six hundred forty thousand, five hundred thirty-three".