218015511079 has 4 divisors (see below), whose sum is σ = 218163721600. Its totient is φ = 217867300560.

The previous prime is 218015511053. The next prime is 218015511083. The reversal of 218015511079 is 970115510812.

218015511079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218015511079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218015511089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74103054 + ... + 74105995.

It is an arithmetic number, because the mean of its divisors is an integer number (54540930400).

Almost surely, 2^218015511079 is an apocalyptic number.

218015511079 is a deficient number, since it is larger than the sum of its proper divisors (148210521).

218015511079 is a wasteful number, since it uses less digits than its factorization.

218015511079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148210520.

The product of its (nonzero) digits is 25200, while the sum is 40.

The spelling of 218015511079 in words is "two hundred eighteen billion, fifteen million, five hundred eleven thousand, seventy-nine".