1604615245 has 8 divisors (see below), whose sum is σ = 1928386584. Its totient is φ = 1281793344.

The previous prime is 1604615239. The next prime is 1604615279. The reversal of 1604615245 is 5425164061.

It can be written as a sum of positive squares in 4 ways, for example, as 988284969 + 616330276 = 31437^2 + 24826^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604615245 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1604615245.

It is a congruent number.

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, 233634 + ... + 240403.

It is an arithmetic number, because the mean of its divisors is an integer number (241048323).

Almost surely, 2^1604615245 is an apocalyptic number.

It is an amenable number.

1604615245 is a deficient number, since it is larger than the sum of its proper divisors (323771339).

1604615245 is an equidigital number, since it uses as much as digits as its factorization.

1604615245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474719.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1604615245 is about 40057.6490198813. The cubic root of 1604615245 is about 1170.7306038997.

The spelling of 1604615245 in words is "one billion, six hundred four million, six hundred fifteen thousand, two hundred forty-five".