611115620856017 has 4 divisors (see below), whose sum is σ = 611116234468260. Its totient is φ = 611115007243776.

The previous prime is 611115620856001. The next prime is 611115620856067. The reversal of 611115620856017 is 710658026511116.

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 67048846448896 + 544066774407121 = 8188336^2 + 23325239^2 .

It is a cyclic number.

It is not a de Polignac number, because 611115620856017 - 2⁴ = 611115620856001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611115620856067) 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, 305309792 + ... + 307304897.

It is an arithmetic number, because the mean of its divisors is an integer number (152779058617065).

Almost surely, 2^{611115620856017} is an apocalyptic number.

It is an amenable number.

611115620856017 is a deficient number, since it is larger than the sum of its proper divisors (613612243).

611115620856017 is an equidigital number, since it uses as much as digits as its factorization.

611115620856017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613612242.

The product of its (nonzero) digits is 604800, while the sum is 50.

The spelling of 611115620856017 in words is "six hundred eleven trillion, one hundred fifteen billion, six hundred twenty million, eight hundred fifty-six thousand, seventeen".