16615715654513 has 2 divisors, whose sum is σ = 16615715654514. Its totient is φ = 16615715654512.

The previous prime is 16615715654501. The next prime is 16615715654537. The reversal of 16615715654513 is 31545651751661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8381071320064 + 8234644334449 = 2895008^2 + 2869607^2 .

It is an emirp because it is prime and its reverse (31545651751661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16615715654513 - 2¹⁰ = 16615715653489 is a prime.

It is not a weakly prime, because it can be changed into another prime (16615715654563) 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, 8307857827256 + 8307857827257.

It is an arithmetic number, because the mean of its divisors is an integer number (8307857827257).

Almost surely, 2^{16615715654513} is an apocalyptic number.

It is an amenable number.

16615715654513 is a deficient number, since it is larger than the sum of its proper divisors (1).

16615715654513 is an equidigital number, since it uses as much as digits as its factorization.

16615715654513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340000, while the sum is 56.

The spelling of 16615715654513 in words is "sixteen trillion, six hundred fifteen billion, seven hundred fifteen million, six hundred fifty-four thousand, five hundred thirteen".