718129601281 has 4 divisors (see below), whose sum is σ = 718832961364. Its totient is φ = 717426241200.

The previous prime is 718129601239. The next prime is 718129601297. The reversal of 718129601281 is 182106921817.

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 348435200656 + 369694400625 = 590284^2 + 608025^2 .

It is a cyclic number.

It is not a de Polignac number, because 718129601281 - 2³⁵ = 683769862913 is a prime.

It is a super-2 number, since 2×718129601281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (718129601081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351678510 + ... + 351680551.

It is an arithmetic number, because the mean of its divisors is an integer number (179708240341).

Almost surely, 2^718129601281 is an apocalyptic number.

It is an amenable number.

718129601281 is a deficient number, since it is larger than the sum of its proper divisors (703360083).

718129601281 is a wasteful number, since it uses less digits than its factorization.

718129601281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703360082.

The product of its (nonzero) digits is 96768, while the sum is 46.

The spelling of 718129601281 in words is "seven hundred eighteen billion, one hundred twenty-nine million, six hundred one thousand, two hundred eighty-one".