1606326905 has 8 divisors (see below), whose sum is σ = 1974606984. Its totient is φ = 1253718400.

The previous prime is 1606326893. The next prime is 1606326929. The reversal of 1606326905 is 5096236061.

It can be written as a sum of positive squares in 4 ways, for example, as 218093824 + 1388233081 = 14768^2 + 37259^2 .

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

It is not a de Polignac number, because 1606326905 - 2¹⁶ = 1606261369 is a prime.

It is a super-2 number, since 2×1606326905² = 5160572251453758050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3917666 + ... + 3918075.

It is an arithmetic number, because the mean of its divisors is an integer number (246825873).

Almost surely, 2^1606326905 is an apocalyptic number.

It is an amenable number.

1606326905 is a deficient number, since it is larger than the sum of its proper divisors (368280079).

1606326905 is an equidigital number, since it uses as much as digits as its factorization.

1606326905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7835787.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 1606326905 is about 40079.0082836390. The cubic root of 1606326905 is about 1171.1467328646.

The spelling of 1606326905 in words is "one billion, six hundred six million, three hundred twenty-six thousand, nine hundred five".