7106261681 has 4 divisors (see below), whose sum is σ = 7524277092. Its totient is φ = 6688246272.

The previous prime is 7106261671. The next prime is 7106261711. The reversal of 7106261681 is 1861626017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5477332081 + 1628929600 = 74009^2 + 40360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7106261681 is a prime.

It is a super-2 number, since 2×7106261681² (a number of 21 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 (7106261621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209007680 + ... + 209007713.

It is an arithmetic number, because the mean of its divisors is an integer number (1881069273).

Almost surely, 2^7106261681 is an apocalyptic number.

It is an amenable number.

7106261681 is a deficient number, since it is larger than the sum of its proper divisors (418015411).

7106261681 is a wasteful number, since it uses less digits than its factorization.

7106261681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418015410.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 7106261681 is about 84298.6457839033. The cubic root of 7106261681 is about 1922.5621971408.

Adding to 7106261681 its reverse (1861626017), we get a palindrome (8967887698).

The spelling of 7106261681 in words is "seven billion, one hundred six million, two hundred sixty-one thousand, six hundred eighty-one".