1604040664 has 8 divisors (see below), whose sum is σ = 3007576260. Its totient is φ = 802020328.

The previous prime is 1604040551. The next prime is 1604040673. The reversal of 1604040664 is 4660404061.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100252534 + ... + 100252549.

Almost surely, 2^1604040664 is an apocalyptic number.

It is an amenable number.

1604040664 is a deficient number, since it is larger than the sum of its proper divisors (1403535596).

1604040664 is a wasteful number, since it uses less digits than its factorization.

1604040664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200505089 (or 200505085 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1604040664 is about 40050.4764515979. The cubic root of 1604040664 is about 1170.5908487216.

The spelling of 1604040664 in words is "one billion, six hundred four million, forty thousand, six hundred sixty-four".