1604322663 has 4 divisors (see below), whose sum is σ = 2139096888. Its totient is φ = 1069548440.

The previous prime is 1604322653. The next prime is 1604322689. The reversal of 1604322663 is 3662234061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1604322663 - 2¹² = 1604318567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604322613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267387108 + ... + 267387113.

It is an arithmetic number, because the mean of its divisors is an integer number (534774222).

Almost surely, 2^1604322663 is an apocalyptic number.

1604322663 is a deficient number, since it is larger than the sum of its proper divisors (534774225).

1604322663 is an equidigital number, since it uses as much as digits as its factorization.

1604322663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534774224.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 1604322663 is about 40053.9968417635. The cubic root of 1604322663 is about 1170.6594434302.

The spelling of 1604322663 in words is "one billion, six hundred four million, three hundred twenty-two thousand, six hundred sixty-three".