445668537997 has 2 divisors, whose sum is σ = 445668537998. Its totient is φ = 445668537996.

The previous prime is 445668537991. The next prime is 445668538031. The reversal of 445668537997 is 799735866544.

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., 386453695716 + 59214842281 = 621654^2 + 243341^2 .

It is a cyclic number.

It is not a de Polignac number, because 445668537997 - 2⁷ = 445668537869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445668537991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222834268998 + 222834268999.

It is an arithmetic number, because the mean of its divisors is an integer number (222834268999).

Almost surely, 2^445668537997 is an apocalyptic number.

It is an amenable number.

445668537997 is a deficient number, since it is larger than the sum of its proper divisors (1).

445668537997 is an equidigital number, since it uses as much as digits as its factorization.

445668537997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1371686400, while the sum is 73.

The spelling of 445668537997 in words is "four hundred forty-five billion, six hundred sixty-eight million, five hundred thirty-seven thousand, nine hundred ninety-seven".