1645334446211 has 16 divisors (see below), whose sum is σ = 1719629995200. Its totient is φ = 1572228137088.

The previous prime is 1645334446207. The next prime is 1645334446243. The reversal of 1645334446211 is 1126444335461.

It is a cyclic number.

It is not a de Polignac number, because 1645334446211 - 2² = 1645334446207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645334446291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4820285 + ... + 5150321.

It is an arithmetic number, because the mean of its divisors is an integer number (107476874700).

Almost surely, 2^{1645334446211} is an apocalyptic number.

1645334446211 is a deficient number, since it is larger than the sum of its proper divisors (74295548989).

1645334446211 is a wasteful number, since it uses less digits than its factorization.

1645334446211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331838.

The product of its digits is 829440, while the sum is 44.

The spelling of 1645334446211 in words is "one trillion, six hundred forty-five billion, three hundred thirty-four million, four hundred forty-six thousand, two hundred eleven".