216318053880 has 96 divisors (see below), whose sum is σ = 703266932160. Its totient is φ = 57665675520.

The previous prime is 216318053867. The next prime is 216318053921. The reversal of 216318053880 is 88350813612.

216318053880 is a `hidden beast` number, since 2 + 1 + 6 + 31 + 8 + 0 + 538 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1003809 + ... + 1200111.

It is an arithmetic number, because the mean of its divisors is an integer number (7325697210).

Almost surely, 2^216318053880 is an apocalyptic number.

216318053880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216318053880 is an abundant number, since it is smaller than the sum of its proper divisors (486948878280).

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

216318053880 is a wasteful number, since it uses less digits than its factorization.

216318053880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199381 (or 199374 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 216318053880 in words is "two hundred sixteen billion, three hundred eighteen million, fifty-three thousand, eight hundred eighty".