445458418772221 has 2 divisors, whose sum is σ = 445458418772222. Its totient is φ = 445458418772220.

The previous prime is 445458418772173. The next prime is 445458418772249. The reversal of 445458418772221 is 122277814854544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256608681380100 + 188849737392121 = 16019010^2 + 13742261^2 .

It is a cyclic number.

It is not a de Polignac number, because 445458418772221 - 2³¹ = 445456271288573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445458418772261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222729209386110 + 222729209386111.

It is an arithmetic number, because the mean of its divisors is an integer number (222729209386111).

Almost surely, 2^{445458418772221} is an apocalyptic number.

It is an amenable number.

445458418772221 is a deficient number, since it is larger than the sum of its proper divisors (1).

445458418772221 is an equidigital number, since it uses as much as digits as its factorization.

445458418772221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160563200, while the sum is 64.

The spelling of 445458418772221 in words is "four hundred forty-five trillion, four hundred fifty-eight billion, four hundred eighteen million, seven hundred seventy-two thousand, two hundred twenty-one".