218748378765 has 128 divisors (see below), whose sum is σ = 424894758912. Its totient is φ = 93972648960.

The previous prime is 218748378749. The next prime is 218748378791. The reversal of 218748378765 is 567873847812.

It is not a de Polignac number, because 218748378765 - 2⁴ = 218748378749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218748378696 and 218748378705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 73825174 + ... + 73828136.

It is an arithmetic number, because the mean of its divisors is an integer number (3319490304).

Almost surely, 2^218748378765 is an apocalyptic number.

It is an amenable number.

218748378765 is a deficient number, since it is larger than the sum of its proper divisors (206146380147).

218748378765 is a wasteful number, since it uses less digits than its factorization.

218748378765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659.

The product of its digits is 126443520, while the sum is 66.

The spelling of 218748378765 in words is "two hundred eighteen billion, seven hundred forty-eight million, three hundred seventy-eight thousand, seven hundred sixty-five".