17517042661 has 2 divisors, whose sum is σ = 17517042662. Its totient is φ = 17517042660.

The previous prime is 17517042623. The next prime is 17517042689. The reversal of 17517042661 is 16624071571.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13120557025 + 4396485636 = 114545^2 + 66306^2 .

It is a cyclic number.

It is not a de Polignac number, because 17517042661 - 2¹⁵ = 17517009893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17517042061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8758521330 + 8758521331.

It is an arithmetic number, because the mean of its divisors is an integer number (8758521331).

Almost surely, 2^17517042661 is an apocalyptic number.

It is an amenable number.

17517042661 is a deficient number, since it is larger than the sum of its proper divisors (1).

17517042661 is an equidigital number, since it uses as much as digits as its factorization.

17517042661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 17517042661 in words is "seventeen billion, five hundred seventeen million, forty-two thousand, six hundred sixty-one".