1645203355233 has 16 divisors (see below), whose sum is σ = 2230666137600. Its totient is φ = 1078387586640.

The previous prime is 1645203355189. The next prime is 1645203355247. The reversal of 1645203355233 is 3325533025461.

It is not a de Polignac number, because 1645203355233 - 2³⁴ = 1628023486049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1645203355283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14465923 + ... + 14579208.

It is an arithmetic number, because the mean of its divisors is an integer number (139416633600).

Almost surely, 2^{1645203355233} is an apocalyptic number.

It is an amenable number.

1645203355233 is a deficient number, since it is larger than the sum of its proper divisors (585462782367).

1645203355233 is a wasteful number, since it uses less digits than its factorization.

1645203355233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29045452.

The product of its (nonzero) digits is 972000, while the sum is 42.

The spelling of 1645203355233 in words is "one trillion, six hundred forty-five billion, two hundred three million, three hundred fifty-five thousand, two hundred thirty-three".