17112452561 has 4 divisors (see below), whose sum is σ = 17114894832. Its totient is φ = 17110010292.

The previous prime is 17112452509. The next prime is 17112452563. The reversal of 17112452561 is 16525421171.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17112452561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (17112452563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210595 + ... + 1224648.

It is an arithmetic number, because the mean of its divisors is an integer number (4278723708).

Almost surely, 2^17112452561 is an apocalyptic number.

It is an amenable number.

17112452561 is a deficient number, since it is larger than the sum of its proper divisors (2442271).

17112452561 is an equidigital number, since it uses as much as digits as its factorization.

17112452561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442270.

The product of its digits is 16800, while the sum is 35.

The spelling of 17112452561 in words is "seventeen billion, one hundred twelve million, four hundred fifty-two thousand, five hundred sixty-one".