171247564853 has 2 divisors, whose sum is σ = 171247564854. Its totient is φ = 171247564852.

The previous prime is 171247564799. The next prime is 171247564871. The reversal of 171247564853 is 358465742171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148361321329 + 22886243524 = 385177^2 + 151282^2 .

It is a cyclic number.

It is not a de Polignac number, because 171247564853 - 2¹⁶ = 171247499317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171247564795 and 171247564804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171247564253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85623782426 + 85623782427.

It is an arithmetic number, because the mean of its divisors is an integer number (85623782427).

Almost surely, 2^171247564853 is an apocalyptic number.

It is an amenable number.

171247564853 is a deficient number, since it is larger than the sum of its proper divisors (1).

171247564853 is an equidigital number, since it uses as much as digits as its factorization.

171247564853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5644800, while the sum is 53.

The spelling of 171247564853 in words is "one hundred seventy-one billion, two hundred forty-seven million, five hundred sixty-four thousand, eight hundred fifty-three".