8235661605 has 16 divisors (see below), whose sum is σ = 13216167744. Its totient is φ = 4379316480.

The previous prime is 8235661601. The next prime is 8235661607. The reversal of 8235661605 is 5061665328.

It is a happy number.

It is not a de Polignac number, because 8235661605 - 2² = 8235661601 is a prime.

It is a super-2 number, since 2×8235661605² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8235661601) 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 15 ways as a sum of consecutive naturals, for example, 809551 + ... + 819660.

It is an arithmetic number, because the mean of its divisors is an integer number (826010484).

Almost surely, 2^8235661605 is an apocalyptic number.

It is an amenable number.

8235661605 is a deficient number, since it is larger than the sum of its proper divisors (4980506139).

8235661605 is a wasteful number, since it uses less digits than its factorization.

8235661605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629556.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 8235661605 is about 90750.5460314151. The cubic root of 8235661605 is about 2019.4487275370.

The spelling of 8235661605 in words is "eight billion, two hundred thirty-five million, six hundred sixty-one thousand, six hundred five".