216740220856 has 32 divisors (see below), whose sum is σ = 409700879280. Its totient is φ = 107490240000.

The previous prime is 216740220787. The next prime is 216740220863. The reversal of 216740220856 is 658022047612.

It is a happy number.

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, 259990 + ... + 707866.

Almost surely, 2^216740220856 is an apocalyptic number.

It is an amenable number.

216740220856 is a deficient number, since it is larger than the sum of its proper divisors (192960658424).

216740220856 is a wasteful number, since it uses less digits than its factorization.

216740220856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448375 (or 448371 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 216740220856 in words is "two hundred sixteen billion, seven hundred forty million, two hundred twenty thousand, eight hundred fifty-six".