1604513065 has 16 divisors (see below), whose sum is σ = 1976380560. Its totient is φ = 1249761280.

The previous prime is 1604513059. The next prime is 1604513069. The reversal of 1604513065 is 5603154061.

It can be written as a sum of positive squares in 8 ways, for example, as 63872064 + 1540641001 = 7992^2 + 39251^2 .

It is not a de Polignac number, because 1604513065 - 2⁵ = 1604513033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1604513069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96657 + ... + 112033.

It is an arithmetic number, because the mean of its divisors is an integer number (123523785).

Almost surely, 2^1604513065 is an apocalyptic number.

It is an amenable number.

1604513065 is a deficient number, since it is larger than the sum of its proper divisors (371867495).

1604513065 is a wasteful number, since it uses less digits than its factorization.

1604513065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15932.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1604513065 is about 40056.3735877326. The cubic root of 1604513065 is about 1170.7057531257.

The spelling of 1604513065 in words is "one billion, six hundred four million, five hundred thirteen thousand, sixty-five".