1605641326 has 8 divisors (see below), whose sum is σ = 2411035200. Its totient is φ = 801962928.

The previous prime is 1605641287. The next prime is 1605641369. The reversal of 1605641326 is 6231465061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1605641291 and 1605641300.

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 3 ways as a sum of consecutive naturals, for example, 426526 + ... + 430273.

It is an arithmetic number, because the mean of its divisors is an integer number (301379400).

Almost surely, 2^1605641326 is an apocalyptic number.

1605641326 is a deficient number, since it is larger than the sum of its proper divisors (805393874).

1605641326 is an equidigital number, since it uses as much as digits as its factorization.

1605641326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857738.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1605641326 is about 40070.4545269953. The cubic root of 1605641326 is about 1170.9800943350.

The spelling of 1605641326 in words is "one billion, six hundred five million, six hundred forty-one thousand, three hundred twenty-six".