17120213557 has 2 divisors, whose sum is σ = 17120213558. Its totient is φ = 17120213556.

The previous prime is 17120213531. The next prime is 17120213573. The reversal of 17120213557 is 75531202171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14313968881 + 2806244676 = 119641^2 + 52974^2 .

It is an emirp because it is prime and its reverse (75531202171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17120213557 - 2¹⁵ = 17120180789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17120213857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8560106778 + 8560106779.

It is an arithmetic number, because the mean of its divisors is an integer number (8560106779).

Almost surely, 2^17120213557 is an apocalyptic number.

It is an amenable number.

17120213557 is a deficient number, since it is larger than the sum of its proper divisors (1).

17120213557 is an equidigital number, since it uses as much as digits as its factorization.

17120213557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 34.

The spelling of 17120213557 in words is "seventeen billion, one hundred twenty million, two hundred thirteen thousand, five hundred fifty-seven".