1645350603 has 16 divisors (see below), whose sum is σ = 2407134240. Its totient is φ = 993417984.

The previous prime is 1645350533. The next prime is 1645350611. The reversal of 1645350603 is 3060535461.

It is not a de Polignac number, because 1645350603 - 2⁸ = 1645350347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1645350643) by changing a digit.

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, 395938 + ... + 400071.

It is an arithmetic number, because the mean of its divisors is an integer number (150445890).

Almost surely, 2^1645350603 is an apocalyptic number.

1645350603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1645350603 is a deficient number, since it is larger than the sum of its proper divisors (761783637).

1645350603 is a wasteful number, since it uses less digits than its factorization.

1645350603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796078.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 1645350603 is about 40562.9215293968. The cubic root of 1645350603 is about 1180.5548006330.

The spelling of 1645350603 in words is "one billion, six hundred forty-five million, three hundred fifty thousand, six hundred three".