5653665561 has 4 divisors (see below), whose sum is σ = 7538220752. Its totient is φ = 3769110372.

The previous prime is 5653665559. The next prime is 5653665617. The reversal of 5653665561 is 1655663565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5653665561 - 2¹ = 5653665559 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 5653665561.

It is not an unprimeable number, because it can be changed into a prime (5653665361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942277591 + ... + 942277596.

It is an arithmetic number, because the mean of its divisors is an integer number (1884555188).

Almost surely, 2^5653665561 is an apocalyptic number.

It is an amenable number.

5653665561 is a deficient number, since it is larger than the sum of its proper divisors (1884555191).

5653665561 is a wasteful number, since it uses less digits than its factorization.

5653665561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884555190.

The product of its digits is 2430000, while the sum is 48.

The square root of 5653665561 is about 75190.8608874775. The cubic root of 5653665561 is about 1781.4625820425.

The spelling of 5653665561 in words is "five billion, six hundred fifty-three million, six hundred sixty-five thousand, five hundred sixty-one".