212456056660 has 12 divisors (see below), whose sum is σ = 446157719028. Its totient is φ = 84982422656.

The previous prime is 212456056609. The next prime is 212456056663. The reversal of 212456056660 is 66650654212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 122368435344 + 90087621316 = 349812^2 + 300146^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212456056663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5311401397 + ... + 5311401436.

It is an arithmetic number, because the mean of its divisors is an integer number (37179809919).

Almost surely, 2^212456056660 is an apocalyptic number.

212456056660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212456056660 is an abundant number, since it is smaller than the sum of its proper divisors (233701662368).

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

212456056660 is a wasteful number, since it uses less digits than its factorization.

212456056660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10622802842 (or 10622802840 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 212456056660 in words is "two hundred twelve billion, four hundred fifty-six million, fifty-six thousand, six hundred sixty".