17261374661 has 2 divisors, whose sum is σ = 17261374662. Its totient is φ = 17261374660.

The previous prime is 17261374639. The next prime is 17261374721. The reversal of 17261374661 is 16647316271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13407324100 + 3854050561 = 115790^2 + 62081^2 .

It is a cyclic number.

It is not a de Polignac number, because 17261374661 - 2⁶ = 17261374597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17261371661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8630687330 + 8630687331.

It is an arithmetic number, because the mean of its divisors is an integer number (8630687331).

Almost surely, 2^17261374661 is an apocalyptic number.

It is an amenable number.

17261374661 is a deficient number, since it is larger than the sum of its proper divisors (1).

17261374661 is an equidigital number, since it uses as much as digits as its factorization.

17261374661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The spelling of 17261374661 in words is "seventeen billion, two hundred sixty-one million, three hundred seventy-four thousand, six hundred sixty-one".