218275367648 has 48 divisors (see below), whose sum is σ = 482906896416. Its totient is φ = 96362365440.

The previous prime is 218275367627. The next prime is 218275367701. The reversal of 218275367648 is 846763572812.

It is a super-2 number, since 2×218275367648² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11396963 + ... + 11416098.

It is an arithmetic number, because the mean of its divisors is an integer number (10060560342).

Almost surely, 2^218275367648 is an apocalyptic number.

It is an amenable number.

218275367648 is an abundant number, since it is smaller than the sum of its proper divisors (264631528768).

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

218275367648 is a wasteful number, since it uses less digits than its factorization.

218275367648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22813107 (or 22813099 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 59.

The spelling of 218275367648 in words is "two hundred eighteen billion, two hundred seventy-five million, three hundred sixty-seven thousand, six hundred forty-eight".