718868817 has 16 divisors (see below), whose sum is σ = 1127638080. Its totient is φ = 451054656.

The previous prime is 718868809. The next prime is 718868863.

It is a happy number.

718868817 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 718868817 - 2³ = 718868809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (718868897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782623 + ... + 783540.

It is an arithmetic number, because the mean of its divisors is an integer number (70477380).

Almost surely, 2^718868817 is an apocalyptic number.

It is an amenable number.

718868817 is a deficient number, since it is larger than the sum of its proper divisors (408769263).

718868817 is a wasteful number, since it uses less digits than its factorization.

718868817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566189 (or 1566183 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 54.

The square root of 718868817 is about 26811.7290938127. The cubic root of 718868817 is about 895.8113246864.

The spelling of 718868817 in words is "seven hundred eighteen million, eight hundred sixty-eight thousand, eight hundred seventeen".