7181314681 has 4 divisors (see below), whose sum is σ = 7262003700. Its totient is φ = 7100625664.

The previous prime is 7181314627. The next prime is 7181314687. The reversal of 7181314681 is 1864131817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1864131817 = 37 ⋅50381941.

It can be written as a sum of positive squares in 2 ways, for example, as 4930286656 + 2251028025 = 70216^2 + 47445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7181314681 is a prime.

It is a super-2 number, since 2×7181314681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7181314687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40344376 + ... + 40344553.

It is an arithmetic number, because the mean of its divisors is an integer number (1815500925).

Almost surely, 2^7181314681 is an apocalyptic number.

It is an amenable number.

7181314681 is a deficient number, since it is larger than the sum of its proper divisors (80689019).

7181314681 is an equidigital number, since it uses as much as digits as its factorization.

7181314681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80689018.

The product of its digits is 32256, while the sum is 40.

The square root of 7181314681 is about 84742.6379162226. The cubic root of 7181314681 is about 1929.3069075635.

The spelling of 7181314681 in words is "seven billion, one hundred eighty-one million, three hundred fourteen thousand, six hundred eighty-one".