17120272661 has 2 divisors, whose sum is σ = 17120272662. Its totient is φ = 17120272660.

The previous prime is 17120272657. The next prime is 17120272669. The reversal of 17120272661 is 16627202171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13063347025 + 4056925636 = 114295^2 + 63694^2 .

It is a cyclic number.

It is not a de Polignac number, because 17120272661 - 2² = 17120272657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17120272669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8560136330 + 8560136331.

It is an arithmetic number, because the mean of its divisors is an integer number (8560136331).

Almost surely, 2^17120272661 is an apocalyptic number.

It is an amenable number.

17120272661 is a deficient number, since it is larger than the sum of its proper divisors (1).

17120272661 is an equidigital number, since it uses as much as digits as its factorization.

17120272661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The spelling of 17120272661 in words is "seventeen billion, one hundred twenty million, two hundred seventy-two thousand, six hundred sixty-one".