16777221134087 has 2 divisors, whose sum is σ = 16777221134088. Its totient is φ = 16777221134086.

The previous prime is 16777221134081. The next prime is 16777221134143. The reversal of 16777221134087 is 78043112277761.

It is an a-pointer prime, because the next prime (16777221134143) can be obtained adding 16777221134087 to its sum of digits (56).

It is a weak prime.

It is an emirp because it is prime and its reverse (78043112277761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16777221134087 - 2³⁸ = 16502343227143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16777221134081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8388610567043 + 8388610567044.

It is an arithmetic number, because the mean of its divisors is an integer number (8388610567044).

Almost surely, 2^{16777221134087} is an apocalyptic number.

16777221134087 is a deficient number, since it is larger than the sum of its proper divisors (1).

16777221134087 is an equidigital number, since it uses as much as digits as its factorization.

16777221134087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5531904, while the sum is 56.

The spelling of 16777221134087 in words is "sixteen trillion, seven hundred seventy-seven billion, two hundred twenty-one million, one hundred thirty-four thousand, eighty-seven".