918446221440001 has 2 divisors, whose sum is σ = 918446221440002. Its totient is φ = 918446221440000.

The previous prime is 918446221439947. The next prime is 918446221440067. The reversal of 918446221440001 is 100044122644819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 775618266805776 + 142827954634225 = 27849924^2 + 11951065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-918446221440001 is a prime.

It is not a weakly prime, because it can be changed into another prime (918446221440401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459223110720000 + 459223110720001.

It is an arithmetic number, because the mean of its divisors is an integer number (459223110720001).

Almost surely, 2^{918446221440001} is an apocalyptic number.

It is an amenable number.

918446221440001 is a deficient number, since it is larger than the sum of its proper divisors (1).

918446221440001 is an equidigital number, since it uses as much as digits as its factorization.

918446221440001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 918446221440001 in words is "nine hundred eighteen trillion, four hundred forty-six billion, two hundred twenty-one million, four hundred forty thousand, one".