3688355561 has 8 divisors (see below), whose sum is σ = 4083716064. Its totient is φ = 3303004320.

The previous prime is 3688355521. The next prime is 3688355569. The reversal of 3688355561 is 1655538863.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3688355561 - 2¹⁴ = 3688339177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3688355569) 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, 2501540 + ... + 2503013.

It is an arithmetic number, because the mean of its divisors is an integer number (510464508).

Almost surely, 2^3688355561 is an apocalyptic number.

It is an amenable number.

3688355561 is a deficient number, since it is larger than the sum of its proper divisors (395360503).

3688355561 is a wasteful number, since it uses less digits than its factorization.

3688355561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004631.

The product of its digits is 2592000, while the sum is 50.

The square root of 3688355561 is about 60731.8331766793. The cubic root of 3688355561 is about 1545.0561258469.

The spelling of 3688355561 in words is "three billion, six hundred eighty-eight million, three hundred fifty-five thousand, five hundred sixty-one".