212261742437208 has 128 divisors (see below), whose sum is σ = 535918856256000. Its totient is φ = 70055697751040.

The previous prime is 212261742437189. The next prime is 212261742437287. The reversal of 212261742437208 is 802734247162212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1988775541 + ... + 1988882267.

It is an arithmetic number, because the mean of its divisors is an integer number (4186866064500).

Almost surely, 2^{212261742437208} is an apocalyptic number.

It is an amenable number.

212261742437208 is an abundant number, since it is smaller than the sum of its proper divisors (323657113818792).

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

212261742437208 is a wasteful number, since it uses less digits than its factorization.

212261742437208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108905 (or 108901 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 51.

The spelling of 212261742437208 in words is "two hundred twelve trillion, two hundred sixty-one billion, seven hundred forty-two million, four hundred thirty-seven thousand, two hundred eight".