16813530857 has 2 divisors, whose sum is σ = 16813530858. Its totient is φ = 16813530856.

The previous prime is 16813530827. The next prime is 16813530869. The reversal of 16813530857 is 75803531861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12290161321 + 4523369536 = 110861^2 + 67256^2 .

It is a cyclic number.

It is not a de Polignac number, because 16813530857 - 2¹⁸ = 16813268713 is a prime.

It is not a weakly prime, because it can be changed into another prime (16813530827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8406765428 + 8406765429.

It is an arithmetic number, because the mean of its divisors is an integer number (8406765429).

Almost surely, 2^16813530857 is an apocalyptic number.

It is an amenable number.

16813530857 is a deficient number, since it is larger than the sum of its proper divisors (1).

16813530857 is an equidigital number, since it uses as much as digits as its factorization.

16813530857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 16813530857 in words is "sixteen billion, eight hundred thirteen million, five hundred thirty thousand, eight hundred fifty-seven".