218128449270 has 32 divisors (see below), whose sum is σ = 524044181088. Its totient is φ = 58108041728.

The previous prime is 218128449257. The next prime is 218128449289. The reversal of 218128449270 is 72944821812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3691749 + ... + 3750368.

It is an arithmetic number, because the mean of its divisors is an integer number (16376380659).

Almost surely, 2^218128449270 is an apocalyptic number.

218128449270 is an abundant number, since it is smaller than the sum of its proper divisors (305915731818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218128449270 is a wasteful number, since it uses less digits than its factorization.

218128449270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7443104.

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 218128449270 in words is "two hundred eighteen billion, one hundred twenty-eight million, four hundred forty-nine thousand, two hundred seventy".