218147922672 has 40 divisors (see below), whose sum is σ = 576654591744. Its totient is φ = 71024904384.

The previous prime is 218147922667. The next prime is 218147922697. The reversal of 218147922672 is 276229741812.

It is a happy number.

It is a super-2 number, since 2×218147922672² (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, 52843848 + ... + 52847975.

Almost surely, 2^218147922672 is an apocalyptic number.

It is an amenable number.

218147922672 is an abundant number, since it is smaller than the sum of its proper divisors (358506669072).

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

218147922672 is a wasteful number, since it uses less digits than its factorization.

218147922672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105691877 (or 105691871 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The spelling of 218147922672 in words is "two hundred eighteen billion, one hundred forty-seven million, nine hundred twenty-two thousand, six hundred seventy-two".