16513666304491 has 2 divisors, whose sum is σ = 16513666304492. Its totient is φ = 16513666304490.

The previous prime is 16513666304411. The next prime is 16513666304533. The reversal of 16513666304491 is 19440366631561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16513666304491 - 2¹³ = 16513666296299 is a prime.

It is not a weakly prime, because it can be changed into another prime (16513666304411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8256833152245 + 8256833152246.

It is an arithmetic number, because the mean of its divisors is an integer number (8256833152246).

Almost surely, 2^{16513666304491} is an apocalyptic number.

16513666304491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16513666304491 is an equidigital number, since it uses as much as digits as its factorization.

16513666304491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 16513666304491 in words is "sixteen trillion, five hundred thirteen billion, six hundred sixty-six million, three hundred four thousand, four hundred ninety-one".