1605606001 has 8 divisors (see below), whose sum is σ = 1694023520. Its totient is φ = 1517579712.

The previous prime is 1605605993. The next prime is 1605606031. The reversal of 1605606001 is 1006065061.

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

It is a cyclic number.

It is not a de Polignac number, because 1605606001 - 2³ = 1605605993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605606031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89355 + ... + 105808.

It is an arithmetic number, because the mean of its divisors is an integer number (211752940).

Almost surely, 2^1605606001 is an apocalyptic number.

It is an amenable number.

1605606001 is a deficient number, since it is larger than the sum of its proper divisors (88417519).

1605606001 is a wasteful number, since it uses less digits than its factorization.

1605606001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195615.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1605606001 is about 40070.0137384553. The cubic root of 1605606001 is about 1170.9715068681.

The spelling of 1605606001 in words is "one billion, six hundred five million, six hundred six thousand, one".