655768212 has 72 divisors (see below), whose sum is σ = 1705830336. Its totient is φ = 195888000.

The previous prime is 655768207. The next prime is 655768219. The reversal of 655768212 is 212867556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655768219) 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, 99912 + ... + 106272.

It is an arithmetic number, because the mean of its divisors is an integer number (23692088).

Almost surely, 2^655768212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655768212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852915168).

655768212 is an abundant number, since it is smaller than the sum of its proper divisors (1050062124).

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

655768212 is a wasteful number, since it uses less digits than its factorization.

655768212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461 (or 6448 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 655768212 is about 25607.9716494688. The cubic root of 655768212 is about 868.7939478345.

It can be divided in two parts, 655 and 768212, that added together give a palindrome (768867).

The spelling of 655768212 in words is "six hundred fifty-five million, seven hundred sixty-eight thousand, two hundred twelve".