5605661653 has 8 divisors (see below), whose sum is σ = 5865793848. Its totient is φ = 5351246784.

The previous prime is 5605661603. The next prime is 5605661681. The reversal of 5605661653 is 3561665065.

It can be written as a sum of positive squares in 4 ways, for example, as 3366668529 + 2238993124 = 58023^2 + 47318^2 .

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 5605661653 - 2²¹ = 5603564501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5605661603) 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, 1427326 + ... + 1431247.

It is an arithmetic number, because the mean of its divisors is an integer number (733224231).

Almost surely, 2^5605661653 is an apocalyptic number.

5605661653 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

5605661653 is a deficient number, since it is larger than the sum of its proper divisors (260132195).

5605661653 is a wasteful number, since it uses less digits than its factorization.

5605661653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858663.

The product of its (nonzero) digits is 486000, while the sum is 43.

The square root of 5605661653 is about 74870.9666893650. The cubic root of 5605661653 is about 1776.4062548173.

The spelling of 5605661653 in words is "five billion, six hundred five million, six hundred sixty-one thousand, six hundred fifty-three".