5605621561 has 8 divisors (see below), whose sum is σ = 5675281920. Its totient is φ = 5536203648.

The previous prime is 5605621493. The next prime is 5605621573. The reversal of 5605621561 is 1651265065.

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 5605621561 - 2¹⁹ = 5605097273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5605621561.

It is not an unprimeable number, because it can be changed into a prime (5605621591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13861 + ... + 106786.

It is an arithmetic number, because the mean of its divisors is an integer number (709410240).

Almost surely, 2^5605621561 is an apocalyptic number.

It is an amenable number.

5605621561 is a deficient number, since it is larger than the sum of its proper divisors (69660359).

5605621561 is a wasteful number, since it uses less digits than its factorization.

5605621561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121223.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 5605621561 is about 74870.6989482534. The cubic root of 5605621561 is about 1776.4020198222.

The spelling of 5605621561 in words is "five billion, six hundred five million, six hundred twenty-one thousand, five hundred sixty-one".