601645561 has 8 divisors (see below), whose sum is σ = 662150304. Its totient is φ = 542109120.

The previous prime is 601645553. The next prime is 601645573. The reversal of 601645561 is 165546106.

It is a happy number.

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 601645561 - 2³ = 601645553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (601645531) 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 7 ways as a sum of consecutive naturals, for example, 240771 + ... + 243256.

It is an arithmetic number, because the mean of its divisors is an integer number (82768788).

Almost surely, 2^601645561 is an apocalyptic number.

It is an amenable number.

601645561 is a deficient number, since it is larger than the sum of its proper divisors (60504743).

601645561 is a wasteful number, since it uses less digits than its factorization.

601645561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484151.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 601645561 is about 24528.4643017047. The cubic root of 601645561 is about 844.2030280755.

It can be divided in two parts, 601645 and 561, that added together give a palindrome (602206).

The spelling of 601645561 in words is "six hundred one million, six hundred forty-five thousand, five hundred sixty-one".