1001606565 has 16 divisors (see below), whose sum is σ = 1686916800. Its totient is φ = 506074752.

The previous prime is 1001606549. The next prime is 1001606581. The reversal of 1001606565 is 5656061001.

It is an interprime number because it is at equal distance from previous prime (1001606549) and next prime (1001606581).

It is not a de Polignac number, because 1001606565 - 2⁴ = 1001606549 is a prime.

It is a super-2 number, since 2×1001606565² = 2006431422102198450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1756920 + ... + 1757489.

It is an arithmetic number, because the mean of its divisors is an integer number (105432300).

Almost surely, 2^1001606565 is an apocalyptic number.

1001606565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001606565 is a deficient number, since it is larger than the sum of its proper divisors (685310235).

1001606565 is a wasteful number, since it uses less digits than its factorization.

1001606565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514436.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1001606565 is about 31648.1684304163. The cubic root of 1001606565 is about 1000.5352351389.

Adding to 1001606565 its reverse (5656061001), we get a palindrome (6657667566).

The spelling of 1001606565 in words is "one billion, one million, six hundred six thousand, five hundred sixty-five".