1604667801 has 32 divisors (see below), whose sum is σ = 2368880640. Its totient is φ = 958088000.

The previous prime is 1604667793. The next prime is 1604667811. The reversal of 1604667801 is 1087664061.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1604667801 - 2³ = 1604667793 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1604667801.

It is not an unprimeable number, because it can be changed into a prime (1604667811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1393576 + ... + 1394726.

It is an arithmetic number, because the mean of its divisors is an integer number (74027520).

Almost surely, 2^1604667801 is an apocalyptic number.

1604667801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1604667801 is a deficient number, since it is larger than the sum of its proper divisors (764212839).

1604667801 is a wasteful number, since it uses less digits than its factorization.

1604667801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1604667801 is about 40058.3050190594. The cubic root of 1604667801 is about 1170.7433854156.

The spelling of 1604667801 in words is "one billion, six hundred four million, six hundred sixty-seven thousand, eight hundred one".