655645117 has 4 divisors (see below), whose sum is σ = 657049536. Its totient is φ = 654240700.

The previous prime is 655645093. The next prime is 655645129. The reversal of 655645117 is 711546556.

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 a cyclic number.

It is not a de Polignac number, because 655645117 - 2¹¹ = 655643069 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 655645117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655645157) 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, 701509 + ... + 702442.

It is an arithmetic number, because the mean of its divisors is an integer number (164262384).

Almost surely, 2^655645117 is an apocalyptic number.

It is an amenable number.

655645117 is a deficient number, since it is larger than the sum of its proper divisors (1404419).

655645117 is a wasteful number, since it uses less digits than its factorization.

655645117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404418.

The product of its digits is 126000, while the sum is 40.

The square root of 655645117 is about 25605.5680858676. The cubic root of 655645117 is about 868.7395836648.

The spelling of 655645117 in words is "six hundred fifty-five million, six hundred forty-five thousand, one hundred seventeen".