17255271661 has 4 divisors (see below), whose sum is σ = 17386991424. Its totient is φ = 17123551900.

The previous prime is 17255271617. The next prime is 17255271679. The reversal of 17255271661 is 16617255271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16617255271 = 43 ⋅386447797.

It is a cyclic number.

It is not a de Polignac number, because 17255271661 - 2²¹ = 17253174509 is a prime.

It is a super-3 number, since 3×17255271661³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17255971661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65859685 + ... + 65859946.

It is an arithmetic number, because the mean of its divisors is an integer number (4346747856).

Almost surely, 2^17255271661 is an apocalyptic number.

It is an amenable number.

17255271661 is a deficient number, since it is larger than the sum of its proper divisors (131719763).

17255271661 is a wasteful number, since it uses less digits than its factorization.

17255271661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131719762.

The product of its digits is 176400, while the sum is 43.

The spelling of 17255271661 in words is "seventeen billion, two hundred fifty-five million, two hundred seventy-one thousand, six hundred sixty-one".