16388630857 has 2 divisors, whose sum is σ = 16388630858. Its totient is φ = 16388630856.

The previous prime is 16388630849. The next prime is 16388630873. The reversal of 16388630857 is 75803688361.

16388630857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13777829641 + 2610801216 = 117379^2 + 51096^2 .

It is a cyclic number.

It is not a de Polignac number, because 16388630857 - 2³ = 16388630849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16388630798 and 16388630807.

It is not a weakly prime, because it can be changed into another prime (16388630957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8194315428 + 8194315429.

It is an arithmetic number, because the mean of its divisors is an integer number (8194315429).

Almost surely, 2^16388630857 is an apocalyptic number.

It is an amenable number.

16388630857 is a deficient number, since it is larger than the sum of its proper divisors (1).

16388630857 is an equidigital number, since it uses as much as digits as its factorization.

16388630857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 16388630857 in words is "sixteen billion, three hundred eighty-eight million, six hundred thirty thousand, eight hundred fifty-seven".