218412231648 has 48 divisors (see below), whose sum is σ = 617434581456. Its totient is φ = 67203763200.

The previous prime is 218412231539. The next prime is 218412231683. The reversal of 218412231648 is 846132214812.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×218412231648² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 87503653 + ... + 87506148.

It is an arithmetic number, because the mean of its divisors is an integer number (12863220447).

Almost surely, 2^218412231648 is an apocalyptic number.

It is an amenable number.

218412231648 is an abundant number, since it is smaller than the sum of its proper divisors (399022349808).

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

218412231648 is a wasteful number, since it uses less digits than its factorization.

218412231648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175009827 (or 175009819 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The spelling of 218412231648 in words is "two hundred eighteen billion, four hundred twelve million, two hundred thirty-one thousand, six hundred forty-eight".