718661007289 has 2 divisors, whose sum is σ = 718661007290. Its totient is φ = 718661007288.

The previous prime is 718661007221. The next prime is 718661007293. The reversal of 718661007289 is 982700166817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548352098064 + 170308909225 = 740508^2 + 412685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718661007289 is a prime.

It is a super-2 number, since 2×718661007289² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (718661007989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359330503644 + 359330503645.

It is an arithmetic number, because the mean of its divisors is an integer number (359330503645).

Almost surely, 2^718661007289 is an apocalyptic number.

It is an amenable number.

718661007289 is a deficient number, since it is larger than the sum of its proper divisors (1).

718661007289 is an equidigital number, since it uses as much as digits as its factorization.

718661007289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 718661007289 in words is "seven hundred eighteen billion, six hundred sixty-one million, seven thousand, two hundred eighty-nine".