1603648345 has 8 divisors (see below), whose sum is σ = 2072407176. Its totient is φ = 1184232576.

The previous prime is 1603648331. The next prime is 1603648367. The reversal of 1603648345 is 5438463061.

1603648345 = 28316² + 28317².

It can be written as a sum of positive squares in 4 ways, for example, as 100380361 + 1503267984 = 10019^2 + 38772^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1603648345 - 2¹³ = 1603640153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1603648298 and 1603648307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12335692 + ... + 12335821.

It is an arithmetic number, because the mean of its divisors is an integer number (259050897).

Almost surely, 2^1603648345 is an apocalyptic number.

1603648345 is the 28317-th centered square number.

It is an amenable number.

1603648345 is a deficient number, since it is larger than the sum of its proper divisors (468758831).

1603648345 is a wasteful number, since it uses less digits than its factorization.

1603648345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24671531.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 1603648345 is about 40045.5783451806. The cubic root of 1603648345 is about 1170.4954059049.

The spelling of 1603648345 in words is "one billion, six hundred three million, six hundred forty-eight thousand, three hundred forty-five".