16604777330377 has 2 divisors, whose sum is σ = 16604777330378. Its totient is φ = 16604777330376.

The previous prime is 16604777330363. The next prime is 16604777330429. The reversal of 16604777330377 is 77303377740661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16255822486201 + 348954844176 = 4031851^2 + 590724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16604777330377 is a prime.

It is not a weakly prime, because it can be changed into another prime (16604777330347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8302388665188 + 8302388665189.

It is an arithmetic number, because the mean of its divisors is an integer number (8302388665189).

Almost surely, 2^{16604777330377} is an apocalyptic number.

It is an amenable number.

16604777330377 is a deficient number, since it is larger than the sum of its proper divisors (1).

16604777330377 is an equidigital number, since it uses as much as digits as its factorization.

16604777330377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65345616, while the sum is 61.

The spelling of 16604777330377 in words is "sixteen trillion, six hundred four billion, seven hundred seventy-seven million, three hundred thirty thousand, three hundred seventy-seven".