1604321667 has 32 divisors (see below), whose sum is σ = 2562235200. Its totient is φ = 986259456.

The previous prime is 1604321659. The next prime is 1604321711. The reversal of 1604321667 is 7661234061.

It is a happy number.

1604321667 is a `hidden beast` number, since 1 + 60 + 432 + 166 + 7 = 666.

It is not a de Polignac number, because 1604321667 - 2³ = 1604321659 is a prime.

It is a super-2 number, since 2×1604321667² = 5147696022411317778, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1604321617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480259 + ... + 483587.

It is an arithmetic number, because the mean of its divisors is an integer number (80069850).

Almost surely, 2^1604321667 is an apocalyptic number.

1604321667 is a deficient number, since it is larger than the sum of its proper divisors (957913533).

1604321667 is a wasteful number, since it uses less digits than its factorization.

1604321667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4724 (or 4718 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1604321667 is about 40053.9844085454. The cubic root of 1604321667 is about 1170.6592011728.

The spelling of 1604321667 in words is "one billion, six hundred four million, three hundred twenty-one thousand, six hundred sixty-seven".