16773765109 has 2 divisors, whose sum is σ = 16773765110. Its totient is φ = 16773765108.

The previous prime is 16773765103. The next prime is 16773765121. The reversal of 16773765109 is 90156737761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8651790225 + 8121974884 = 93015^2 + 90122^2 .

It is a cyclic number.

It is not a de Polignac number, because 16773765109 - 2¹⁵ = 16773732341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16773765103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8386882554 + 8386882555.

It is an arithmetic number, because the mean of its divisors is an integer number (8386882555).

Almost surely, 2^16773765109 is an apocalyptic number.

It is an amenable number.

16773765109 is a deficient number, since it is larger than the sum of its proper divisors (1).

16773765109 is an equidigital number, since it uses as much as digits as its factorization.

16773765109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1666980, while the sum is 52.

The spelling of 16773765109 in words is "sixteen billion, seven hundred seventy-three million, seven hundred sixty-five thousand, one hundred nine".