218645860959 has 48 divisors (see below), whose sum is σ = 332666590464. Its totient is φ = 138189542400.

The previous prime is 218645860943. The next prime is 218645860969. The reversal of 218645860959 is 959068546812.

218645860959 is a `hidden beast` number, since 2 + 18 + 6 + 4 + 5 + 8 + 609 + 5 + 9 = 666.

It is not a de Polignac number, because 218645860959 - 2⁴ = 218645860943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218645860896 and 218645860905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218645860969) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9999879 + ... + 10021719.

It is an arithmetic number, because the mean of its divisors is an integer number (6930553968).

Almost surely, 2^218645860959 is an apocalyptic number.

218645860959 is a deficient number, since it is larger than the sum of its proper divisors (114020729505).

218645860959 is a wasteful number, since it uses less digits than its factorization.

218645860959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22608 (or 22605 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 63.

The spelling of 218645860959 in words is "two hundred eighteen billion, six hundred forty-five million, eight hundred sixty thousand, nine hundred fifty-nine".