1604735663 has 8 divisors (see below), whose sum is σ = 1621656768. Its totient is φ = 1587890304.

The previous prime is 1604735659. The next prime is 1604735669. The reversal of 1604735663 is 3665374061.

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 1604735663 - 2² = 1604735659 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 1604735663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604735669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24170 + ... + 61592.

It is an arithmetic number, because the mean of its divisors is an integer number (202707096).

Almost surely, 2^1604735663 is an apocalyptic number.

1604735663 is a deficient number, since it is larger than the sum of its proper divisors (16921105).

1604735663 is a wasteful number, since it uses less digits than its factorization.

1604735663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37873.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 1604735663 is about 40059.1520504366. The cubic root of 1604735663 is about 1170.7598889079.

The spelling of 1604735663 in words is "one billion, six hundred four million, seven hundred thirty-five thousand, six hundred sixty-three".