1604168663 has 8 divisors (see below), whose sum is σ = 1623038400. Its totient is φ = 1585317888.

The previous prime is 1604168627. The next prime is 1604168681. The reversal of 1604168663 is 3668614061.

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 1604168663 - 2⁸ = 1604168407 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 1604168663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604168963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235970 + ... + 242672.

It is an arithmetic number, because the mean of its divisors is an integer number (202879800).

Almost surely, 2^1604168663 is an apocalyptic number.

1604168663 is a deficient number, since it is larger than the sum of its proper divisors (18869737).

1604168663 is an equidigital number, since it uses as much as digits as its factorization.

1604168663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 1604168663 is about 40052.0743907229. The cubic root of 1604168663 is about 1170.6219847720.

The spelling of 1604168663 in words is "one billion, six hundred four million, one hundred sixty-eight thousand, six hundred sixty-three".