212874979268 has 54 divisors (see below), whose sum is σ = 458901380826. Its totient is φ = 85854795264.

The previous prime is 212874979241. The next prime is 212874979337. The reversal of 212874979268 is 862979478212.

It can be written as a sum of positive squares in 3 ways, for example, as 683927104 + 212191052164 = 26152^2 + 460642^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26628680 + ... + 26636672.

It is an arithmetic number, because the mean of its divisors is an integer number (8498173719).

Almost surely, 2^212874979268 is an apocalyptic number.

212874979268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

212874979268 is an abundant number, since it is smaller than the sum of its proper divisors (246026401558).

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

212874979268 is an frugal number, since it uses more digits than its factorization.

212874979268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16021 (or 8019 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 65.

The spelling of 212874979268 in words is "two hundred twelve billion, eight hundred seventy-four million, nine hundred seventy-nine thousand, two hundred sixty-eight".