918446221439699 has 2 divisors, whose sum is σ = 918446221439700. Its totient is φ = 918446221439698.

The previous prime is 918446221439627. The next prime is 918446221439717. The reversal of 918446221439699 is 996934122644819.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 918446221439699 - 2¹⁶ = 918446221374163 is a prime.

It is a super-2 number, since 2×918446221439699² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (918446221436699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459223110719849 + 459223110719850.

It is an arithmetic number, because the mean of its divisors is an integer number (459223110719850).

Almost surely, 2^{918446221439699} is an apocalyptic number.

918446221439699 is a deficient number, since it is larger than the sum of its proper divisors (1).

918446221439699 is an equidigital number, since it uses as much as digits as its factorization.

918446221439699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451188224, while the sum is 77.

The spelling of 918446221439699 in words is "nine hundred eighteen trillion, four hundred forty-six billion, two hundred twenty-one million, four hundred thirty-nine thousand, six hundred ninety-nine".