1608605501 has 6 divisors (see below), whose sum is σ = 1708795770. Its totient is φ = 1513981376.

The previous prime is 1608605497. The next prime is 1608605519. The reversal of 1608605501 is 1055068061.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 313325401 + 1295280100 = 17701^2 + 35990^2 .

It is not a de Polignac number, because 1608605501 - 2² = 1608605497 is a prime.

It is a super-2 number, since 2×1608605501² = 5175223315694922002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608605561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2782766 + ... + 2783343.

It is an arithmetic number, because the mean of its divisors is an integer number (284799295).

Almost surely, 2^1608605501 is an apocalyptic number.

It is an amenable number.

1608605501 is a deficient number, since it is larger than the sum of its proper divisors (100190269).

1608605501 is an equidigital number, since it uses as much as digits as its factorization.

1608605501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566143 (or 5566126 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1608605501 is about 40107.4245121773. The cubic root of 1608605501 is about 1171.7002336175.

The spelling of 1608605501 in words is "one billion, six hundred eight million, six hundred five thousand, five hundred one".