1604689801 has 16 divisors (see below), whose sum is σ = 1891713600. Its totient is φ = 1341961920.

The previous prime is 1604689777. The next prime is 1604689811. The reversal of 1604689801 is 1089864061.

It is not a de Polignac number, because 1604689801 - 2¹¹ = 1604687753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604689811) 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 15 ways as a sum of consecutive naturals, for example, 22750 + ... + 61048.

It is an arithmetic number, because the mean of its divisors is an integer number (118232100).

Almost surely, 2^1604689801 is an apocalyptic number.

1604689801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1604689801 is a deficient number, since it is larger than the sum of its proper divisors (287023799).

1604689801 is a wasteful number, since it uses less digits than its factorization.

1604689801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38616.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1604689801 is about 40058.5796178547. The cubic root of 1604689801 is about 1170.7487356895.

The spelling of 1604689801 in words is "one billion, six hundred four million, six hundred eighty-nine thousand, eight hundred one".