17187792157 has 2 divisors, whose sum is σ = 17187792158. Its totient is φ = 17187792156.

The previous prime is 17187792121. The next prime is 17187792161. The reversal of 17187792157 is 75129778171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15869448676 + 1318343481 = 125974^2 + 36309^2 .

It is a cyclic number.

It is not a de Polignac number, because 17187792157 - 2⁷ = 17187792029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17187792098 and 17187792107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17187792757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8593896078 + 8593896079.

It is an arithmetic number, because the mean of its divisors is an integer number (8593896079).

Almost surely, 2^17187792157 is an apocalyptic number.

It is an amenable number.

17187792157 is a deficient number, since it is larger than the sum of its proper divisors (1).

17187792157 is an equidigital number, since it uses as much as digits as its factorization.

17187792157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728720, while the sum is 55.

The spelling of 17187792157 in words is "seventeen billion, one hundred eighty-seven million, seven hundred ninety-two thousand, one hundred fifty-seven".