655617216384 has 192 divisors, whose sum is σ = 2097271612800. Its totient is φ = 195220869120.

The previous prime is 655617216383. The next prime is 655617216403. The reversal of 655617216384 is 483612716556.

It is a happy number.

655617216384 is a `hidden beast` number, since 6 + 5 + 5 + 617 + 2 + 16 + 3 + 8 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-3 number, since 3×655617216384³ (a number of 36 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 655617216384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655617216383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241839 + ... + 1170350.

It is an arithmetic number, because the mean of its divisors is an integer number (10923289650).

Almost surely, 2^655617216384 is an apocalyptic number.

655617216384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655617216384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048635806400).

655617216384 is an abundant number, since it is smaller than the sum of its proper divisors (1441654396416).

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

655617216384 is a wasteful number, since it uses less digits than its factorization.

655617216384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412253 (or 1412238 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 655617216384 in words is "six hundred fifty-five billion, six hundred seventeen million, two hundred sixteen thousand, three hundred eighty-four".