718661007243 has 6 divisors (see below), whose sum is σ = 1038065899364. Its totient is φ = 479107338156.

The previous prime is 718661007221. The next prime is 718661007289. The reversal of 718661007243 is 342700166817.

718661007243 is a `hidden beast` number, since 7 + 1 + 8 + 6 + 610 + 0 + 7 + 24 + 3 = 666.

It is not a de Polignac number, because 718661007243 - 2⁹ = 718661006731 is a prime.

It is a super-2 number, since 2×718661007243² (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 (718661007293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39925611505 + ... + 39925611522.

Almost surely, 2^718661007243 is an apocalyptic number.

718661007243 is a deficient number, since it is larger than the sum of its proper divisors (319404892121).

718661007243 is a wasteful number, since it uses less digits than its factorization.

718661007243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79851223033 (or 79851223030 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 718661007243 in words is "seven hundred eighteen billion, six hundred sixty-one million, seven thousand, two hundred forty-three".