8261718316761 has 128 divisors (see below), whose sum is σ = 14642141552640. Its totient is φ = 4022655436800.

The previous prime is 8261718316729. The next prime is 8261718316781. The reversal of 8261718316761 is 1676138171628.

It is not a de Polignac number, because 8261718316761 - 2⁵ = 8261718316729 is a prime.

It is a super-2 number, since 2×8261718316761² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8261718316781) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 415339626 + ... + 415359516.

It is an arithmetic number, because the mean of its divisors is an integer number (114391730880).

Almost surely, 2^{8261718316761} is an apocalyptic number.

It is an amenable number.

8261718316761 is a deficient number, since it is larger than the sum of its proper divisors (6380423235879).

8261718316761 is a wasteful number, since it uses less digits than its factorization.

8261718316761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22247.

The product of its digits is 4064256, while the sum is 57.

The spelling of 8261718316761 in words is "eight trillion, two hundred sixty-one billion, seven hundred eighteen million, three hundred sixteen thousand, seven hundred sixty-one".