561453655 has 8 divisors (see below), whose sum is σ = 769993632. Its totient is φ = 384996768.

The previous prime is 561453653. The next prime is 561453661. The reversal of 561453655 is 556354165.

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 561453655 - 2¹ = 561453653 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 (561453653) 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, 8020732 + ... + 8020801.

It is an arithmetic number, because the mean of its divisors is an integer number (96249204).

Almost surely, 2^561453655 is an apocalyptic number.

561453655 is a deficient number, since it is larger than the sum of its proper divisors (208539977).

561453655 is a wasteful number, since it uses less digits than its factorization.

561453655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16041545.

The product of its digits is 270000, while the sum is 40.

The square root of 561453655 is about 23695.0132939401. The cubic root of 561453655 is about 824.9696493273.

The spelling of 561453655 in words is "five hundred sixty-one million, four hundred fifty-three thousand, six hundred fifty-five".