6205453661 has 12 divisors (see below), whose sum is σ = 6822900000. Its totient is φ = 5639643240.

The previous prime is 6205453621. The next prime is 6205453687. The reversal of 6205453661 is 1663545026.

It is a happy number.

It is not a de Polignac number, because 6205453661 - 2¹⁰ = 6205452637 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 (6205453601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 599750 + ... + 610008.

It is an arithmetic number, because the mean of its divisors is an integer number (568575000).

Almost surely, 2^6205453661 is an apocalyptic number.

It is an amenable number.

6205453661 is a deficient number, since it is larger than the sum of its proper divisors (617446339).

6205453661 is a wasteful number, since it uses less digits than its factorization.

6205453661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15280 (or 15269 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 6205453661 is about 78774.7019099406. The cubic root of 6205453661 is about 1837.6290410310.

Adding to 6205453661 its reverse (1663545026), we get a palindrome (7868998687).

The spelling of 6205453661 in words is "six billion, two hundred five million, four hundred fifty-three thousand, six hundred sixty-one".