1604742165 has 64 divisors (see below), whose sum is σ = 3079641600. Its totient is φ = 788147712.

The previous prime is 1604742157. The next prime is 1604742193. The reversal of 1604742165 is 5612474061.

1604742165 is a `hidden beast` number, since 1 + 604 + 7 + 42 + 1 + 6 + 5 = 666.

It is not a de Polignac number, because 1604742165 - 2³ = 1604742157 is a prime.

It is a super-2 number, since 2×1604742165² = 5150394832257774450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 997792 + ... + 999398.

It is an arithmetic number, because the mean of its divisors is an integer number (48119400).

Almost surely, 2^1604742165 is an apocalyptic number.

1604742165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1604742165 is a deficient number, since it is larger than the sum of its proper divisors (1474899435).

1604742165 is a wasteful number, since it uses less digits than its factorization.

1604742165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203 (or 2197 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1604742165 is about 40059.2332053423. The cubic root of 1604742165 is about 1170.7614701175.

The spelling of 1604742165 in words is "one billion, six hundred four million, seven hundred forty-two thousand, one hundred sixty-five".