718612261 has 4 divisors (see below), whose sum is σ = 738034252. Its totient is φ = 699190272.

The previous prime is 718612241. The next prime is 718612267. The reversal of 718612261 is 162216817.

718612261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 646684900 + 71927361 = 25430^2 + 8481^2 .

It is a cyclic number.

It is not a de Polignac number, because 718612261 - 2¹³ = 718604069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718612267) 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, 9710940 + ... + 9711013.

It is an arithmetic number, because the mean of its divisors is an integer number (184508563).

Almost surely, 2^718612261 is an apocalyptic number.

It is an amenable number.

718612261 is a deficient number, since it is larger than the sum of its proper divisors (19421991).

718612261 is a wasteful number, since it uses less digits than its factorization.

718612261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19421990.

The product of its digits is 8064, while the sum is 34.

The square root of 718612261 is about 26806.9442682302. The cubic root of 718612261 is about 895.7047437586.

The spelling of 718612261 in words is "seven hundred eighteen million, six hundred twelve thousand, two hundred sixty-one".