718857228745 has 4 divisors (see below), whose sum is σ = 862628674500. Its totient is φ = 575085782992.

The previous prime is 718857228743. The next prime is 718857228751. The reversal of 718857228745 is 547822758817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547822758817 = 9839 ⋅55678703.

It can be written as a sum of positive squares in 2 ways, for example, as 455404976569 + 263452252176 = 674837^2 + 513276^2 .

It is a cyclic number.

It is not a de Polignac number, because 718857228745 - 2¹ = 718857228743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (718857228743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71885722870 + ... + 71885722879.

It is an arithmetic number, because the mean of its divisors is an integer number (215657168625).

Almost surely, 2^718857228745 is an apocalyptic number.

It is an amenable number.

718857228745 is a deficient number, since it is larger than the sum of its proper divisors (143771445755).

718857228745 is a wasteful number, since it uses less digits than its factorization.

718857228745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143771445754.

The product of its digits is 70246400, while the sum is 64.

The spelling of 718857228745 in words is "seven hundred eighteen billion, eight hundred fifty-seven million, two hundred twenty-eight thousand, seven hundred forty-five".