718188318561 has 16 divisors (see below), whose sum is σ = 1096278894464. Its totient is φ = 409682064384.

The previous prime is 718188318539. The next prime is 718188318563. The reversal of 718188318561 is 165813881817.

It is a happy number.

It is not a de Polignac number, because 718188318561 - 2¹⁰ = 718188317537 is a prime.

It is a super-2 number, since 2×718188318561² (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 (718188318563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29623450 + ... + 29647683.

It is an arithmetic number, because the mean of its divisors is an integer number (68517430904).

Almost surely, 2^718188318561 is an apocalyptic number.

It is an amenable number.

718188318561 is a deficient number, since it is larger than the sum of its proper divisors (378090575903).

718188318561 is a wasteful number, since it uses less digits than its factorization.

718188318561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59271720.

The product of its digits is 2580480, while the sum is 57.

The spelling of 718188318561 in words is "seven hundred eighteen billion, one hundred eighty-eight million, three hundred eighteen thousand, five hundred sixty-one".