7129713580681 has 4 divisors (see below), whose sum is σ = 7130551098132. Its totient is φ = 7128876063232.

The previous prime is 7129713580669. The next prime is 7129713580699. The reversal of 7129713580681 is 1860853179217.

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 5373402163600 + 1756311417081 = 2318060^2 + 1325259^2 .

It is a cyclic number.

It is not a de Polignac number, because 7129713580681 - 2¹¹ = 7129713578633 is a prime.

It is a super-2 number, since 2×7129713580681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7129713580601) 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, 418745956 + ... + 418762981.

It is an arithmetic number, because the mean of its divisors is an integer number (1782637774533).

Almost surely, 2^{7129713580681} is an apocalyptic number.

It is an amenable number.

7129713580681 is a deficient number, since it is larger than the sum of its proper divisors (837517451).

7129713580681 is an equidigital number, since it uses as much as digits as its factorization.

7129713580681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837517450.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 7129713580681 in words is "seven trillion, one hundred twenty-nine billion, seven hundred thirteen million, five hundred eighty thousand, six hundred eighty-one".