16778090933 has 2 divisors, whose sum is σ = 16778090934. Its totient is φ = 16778090932.

The previous prime is 16778090893. The next prime is 16778090939. The reversal of 16778090933 is 33909087761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15634501444 + 1143589489 = 125038^2 + 33817^2 .

It is a cyclic number.

It is not a de Polignac number, because 16778090933 - 2¹⁸ = 16777828789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16778090939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8389045466 + 8389045467.

It is an arithmetic number, because the mean of its divisors is an integer number (8389045467).

Almost surely, 2^16778090933 is an apocalyptic number.

It is an amenable number.

16778090933 is a deficient number, since it is larger than the sum of its proper divisors (1).

16778090933 is an equidigital number, since it uses as much as digits as its factorization.

16778090933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The spelling of 16778090933 in words is "sixteen billion, seven hundred seventy-eight million, ninety thousand, nine hundred thirty-three".