1645532245 has 16 divisors (see below), whose sum is σ = 2263442688. Its totient is φ = 1125008640.

The previous prime is 1645532233. The next prime is 1645532293. The reversal of 1645532245 is 5422355461.

It is not a de Polignac number, because 1645532245 - 2⁹ = 1645531733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57961 + ... + 81550.

It is an arithmetic number, because the mean of its divisors is an integer number (141465168).

Almost surely, 2^1645532245 is an apocalyptic number.

It is an amenable number.

1645532245 is a deficient number, since it is larger than the sum of its proper divisors (617910443).

1645532245 is a wasteful number, since it uses less digits than its factorization.

1645532245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139860.

The product of its digits is 144000, while the sum is 37.

The square root of 1645532245 is about 40565.1604828577. The cubic root of 1645532245 is about 1180.5982423254.

The spelling of 1645532245 in words is "one billion, six hundred forty-five million, five hundred thirty-two thousand, two hundred forty-five".