6445550361473 has 2 divisors, whose sum is σ = 6445550361474. Its totient is φ = 6445550361472.

The previous prime is 6445550361469. The next prime is 6445550361643. The reversal of 6445550361473 is 3741630555446.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4957716387649 + 1487833973824 = 2226593^2 + 1219768^2 .

It is a cyclic number.

It is not a de Polignac number, because 6445550361473 - 2² = 6445550361469 is a prime.

It is not a weakly prime, because it can be changed into another prime (6445550361373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222775180736 + 3222775180737.

It is an arithmetic number, because the mean of its divisors is an integer number (3222775180737).

Almost surely, 2^{6445550361473} is an apocalyptic number.

It is an amenable number.

6445550361473 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445550361473 is an equidigital number, since it uses as much as digits as its factorization.

6445550361473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144000, while the sum is 53.

The spelling of 6445550361473 in words is "six trillion, four hundred forty-five billion, five hundred fifty million, three hundred sixty-one thousand, four hundred seventy-three".