655116817 has 8 divisors (see below), whose sum is σ = 658871136. Its totient is φ = 651373632.

The previous prime is 655116799. The next prime is 655116823. The reversal of 655116817 is 718611556.

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 655116817 - 2²³ = 646728209 is a prime.

It is a super-2 number, since 2×655116817² = 858356087832422978, which contains 22 as substring.

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 655116817.

It is not an unprimeable number, because it can be changed into a prime (655116877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133593 + ... + 138409.

It is an arithmetic number, because the mean of its divisors is an integer number (82358892).

Almost surely, 2^655116817 is an apocalyptic number.

It is an amenable number.

655116817 is a deficient number, since it is larger than the sum of its proper divisors (3754319).

655116817 is a wasteful number, since it uses less digits than its factorization.

655116817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5567.

The product of its digits is 50400, while the sum is 40.

The square root of 655116817 is about 25595.2498913373. The cubic root of 655116817 is about 868.5061858320.

The spelling of 655116817 in words is "six hundred fifty-five million, one hundred sixteen thousand, eight hundred seventeen".