16775128133 has 2 divisors, whose sum is σ = 16775128134. Its totient is φ = 16775128132.

The previous prime is 16775128129. The next prime is 16775128151. The reversal of 16775128133 is 33182157761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15345758884 + 1429369249 = 123878^2 + 37807^2 .

It is a cyclic number.

It is not a de Polignac number, because 16775128133 - 2² = 16775128129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16775128163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8387564066 + 8387564067.

It is an arithmetic number, because the mean of its divisors is an integer number (8387564067).

Almost surely, 2^16775128133 is an apocalyptic number.

It is an amenable number.

16775128133 is a deficient number, since it is larger than the sum of its proper divisors (1).

16775128133 is an equidigital number, since it uses as much as digits as its factorization.

16775128133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The spelling of 16775128133 in words is "sixteen billion, seven hundred seventy-five million, one hundred twenty-eight thousand, one hundred thirty-three".