17155649945 has 12 divisors (see below), whose sum is σ = 23947887204. Its totient is φ = 11763874080.

The previous prime is 17155649899. The next prime is 17155649947. The reversal of 17155649945 is 54994655171.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4997500249 + 12158149696 = 70693^2 + 110264^2 .

It is not a de Polignac number, because 17155649945 - 2¹⁰ = 17155648921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17155649947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35011286 + ... + 35011775.

It is an arithmetic number, because the mean of its divisors is an integer number (1995657267).

Almost surely, 2^17155649945 is an apocalyptic number.

It is an amenable number.

17155649945 is a deficient number, since it is larger than the sum of its proper divisors (6792237259).

17155649945 is an equidigital number, since it uses as much as digits as its factorization.

17155649945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70023080 (or 70023073 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 56.

The spelling of 17155649945 in words is "seventeen billion, one hundred fifty-five million, six hundred forty-nine thousand, nine hundred forty-five".