17755278055117 has 4 divisors (see below), whose sum is σ = 17938322158876. Its totient is φ = 17572233951360.

The previous prime is 17755278055103. The next prime is 17755278055199. The reversal of 17755278055117 is 71155087255771.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4283985108841 + 13471292946276 = 2069779^2 + 3670326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17755278055117 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 (17755278055517) 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, 91522051734 + ... + 91522051927.

It is an arithmetic number, because the mean of its divisors is an integer number (4484580539719).

Almost surely, 2^{17755278055117} is an apocalyptic number.

It is an amenable number.

17755278055117 is a deficient number, since it is larger than the sum of its proper divisors (183044103759).

17755278055117 is an equidigital number, since it uses as much as digits as its factorization.

17755278055117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183044103758.

The product of its (nonzero) digits is 24010000, while the sum is 61.

The spelling of 17755278055117 in words is "seventeen trillion, seven hundred fifty-five billion, two hundred seventy-eight million, fifty-five thousand, one hundred seventeen".