17157378857 has 2 divisors, whose sum is σ = 17157378858. Its totient is φ = 17157378856.

The previous prime is 17157378769. The next prime is 17157378871. The reversal of 17157378857 is 75887375171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10496207401 + 6661171456 = 102451^2 + 81616^2 .

It is an emirp because it is prime and its reverse (75887375171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17157378857 - 2¹⁰ = 17157377833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17157378796 and 17157378805.

It is not a weakly prime, because it can be changed into another prime (17157578857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8578689428 + 8578689429.

It is an arithmetic number, because the mean of its divisors is an integer number (8578689429).

Almost surely, 2^17157378857 is an apocalyptic number.

It is an amenable number.

17157378857 is a deficient number, since it is larger than the sum of its proper divisors (1).

17157378857 is an equidigital number, since it uses as much as digits as its factorization.

17157378857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11524800, while the sum is 59.

The spelling of 17157378857 in words is "seventeen billion, one hundred fifty-seven million, three hundred seventy-eight thousand, eight hundred fifty-seven".