445680342181853 has 2 divisors, whose sum is σ = 445680342181854. Its totient is φ = 445680342181852.

The previous prime is 445680342181849. The next prime is 445680342181873. The reversal of 445680342181853 is 358181243086544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291943082940964 + 153737259240889 = 17086342^2 + 12399083^2 .

It is a cyclic number.

It is not a de Polignac number, because 445680342181853 - 2² = 445680342181849 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445680342181813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222840171090926 + 222840171090927.

It is an arithmetic number, because the mean of its divisors is an integer number (222840171090927).

Almost surely, 2^{445680342181853} is an apocalyptic number.

It is an amenable number.

445680342181853 is a deficient number, since it is larger than the sum of its proper divisors (1).

445680342181853 is an equidigital number, since it uses as much as digits as its factorization.

445680342181853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88473600, while the sum is 62.

The spelling of 445680342181853 in words is "four hundred forty-five trillion, six hundred eighty billion, three hundred forty-two million, one hundred eighty-one thousand, eight hundred fifty-three".