218650661713 has 8 divisors (see below), whose sum is σ = 238629222720. Its totient is φ = 198688972080.

The previous prime is 218650661689. The next prime is 218650661767. The reversal of 218650661713 is 317166056812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218650661713 - 2³⁷ = 81211708241 is a prime.

It is a super-2 number, since 2×218650661713² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218650661413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4190733 + ... + 4242586.

It is an arithmetic number, because the mean of its divisors is an integer number (29828652840).

Almost surely, 2^218650661713 is an apocalyptic number.

It is an amenable number.

218650661713 is a deficient number, since it is larger than the sum of its proper divisors (19978561007).

218650661713 is a wasteful number, since it uses less digits than its factorization.

218650661713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8435687.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 218650661713 in words is "two hundred eighteen billion, six hundred fifty million, six hundred sixty-one thousand, seven hundred thirteen".