159674517217 has 2 divisors, whose sum is σ = 159674517218. Its totient is φ = 159674517216.

The previous prime is 159674517173. The next prime is 159674517227. The reversal of 159674517217 is 712715476951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158174039521 + 1500477696 = 397711^2 + 38736^2 .

It is a cyclic number.

It is not a de Polignac number, because 159674517217 - 2⁷ = 159674517089 is a prime.

It is not a weakly prime, because it can be changed into another prime (159674517227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79837258608 + 79837258609.

It is an arithmetic number, because the mean of its divisors is an integer number (79837258609).

Almost surely, 2^159674517217 is an apocalyptic number.

It is an amenable number.

159674517217 is a deficient number, since it is larger than the sum of its proper divisors (1).

159674517217 is an equidigital number, since it uses as much as digits as its factorization.

159674517217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3704400, while the sum is 55.

The spelling of 159674517217 in words is "one hundred fifty-nine billion, six hundred seventy-four million, five hundred seventeen thousand, two hundred seventeen".