216804776670 has 24 divisors (see below), whose sum is σ = 563692419576. Its totient is φ = 57814607088.

The previous prime is 216804776653. The next prime is 216804776677. The reversal of 216804776670 is 76677408612.

216804776670 is a `hidden beast` number, since 2 + 168 + 0 + 477 + 6 + 6 + 7 + 0 = 666.

It is a super-2 number, since 2×216804776670² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216804776677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1204470892 + ... + 1204471071.

It is an arithmetic number, because the mean of its divisors is an integer number (23487184149).

Almost surely, 2^216804776670 is an apocalyptic number.

216804776670 is an abundant number, since it is smaller than the sum of its proper divisors (346887642906).

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

216804776670 is a wasteful number, since it uses less digits than its factorization.

216804776670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408941976 (or 2408941973 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 216804776670 in words is "two hundred sixteen billion, eight hundred four million, seven hundred seventy-six thousand, six hundred seventy".