8461169798481 has 15 divisors (see below), whose sum is σ = 12639564361963. Its totient is φ = 5640762412800.

The previous prime is 8461169798479. The next prime is 8461169798513. The reversal of 8461169798481 is 1848979611648.

The square root of 8461169798481 is 2908809.

It is a perfect power (a square), and thus also a powerful number.

8461169798481 is a `hidden beast` number, since 8 + 4 + 6 + 11 + 69 + 79 + 8 + 481 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6533182008081 + 1927987790400 = 2556009^2 + 1388520^2 .

It is not a de Polignac number, because 8461169798481 - 2¹ = 8461169798479 is a prime.

It is a super-2 number, since 2×8461169798481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8461169790481) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 26017681 + ... + 26340881.

Almost surely, 2^{8461169798481} is an apocalyptic number.

8461169798481 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

8461169798481 is the 2908809-th square number.

8461169798481 is the 1454405-th centered octagonal number.

It is an amenable number.

8461169798481 is a deficient number, since it is larger than the sum of its proper divisors (4178394563482).

8461169798481 is an frugal number, since it uses more digits than its factorization.

8461169798481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646414 (or 323204 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 72.

The spelling of 8461169798481 in words is "eight trillion, four hundred sixty-one billion, one hundred sixty-nine million, seven hundred ninety-eight thousand, four hundred eighty-one".