216856698480 has 120 divisors (see below), whose sum is σ = 728408378880. Its totient is φ = 57818027520.

The previous prime is 216856698473. The next prime is 216856698491. The reversal of 216856698480 is 84896658612.

216856698480 is a `hidden beast` number, since 2 + 1 + 6 + 8 + 5 + 66 + 98 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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, 4491106 + ... + 4539134.

It is an arithmetic number, because the mean of its divisors is an integer number (6070069824).

Almost surely, 2^216856698480 is an apocalyptic number.

216856698480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216856698480 is an abundant number, since it is smaller than the sum of its proper divisors (511551680400).

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

216856698480 is a wasteful number, since it uses less digits than its factorization.

216856698480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54319 (or 54310 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 216856698480 in words is "two hundred sixteen billion, eight hundred fifty-six million, six hundred ninety-eight thousand, four hundred eighty".