212644470924 has 18 divisors (see below), whose sum is σ = 537517968260. Its totient is φ = 70881490296.

The previous prime is 212644470893. The next prime is 212644470971. The reversal of 212644470924 is 429074446212.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 212644470924.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2953395394 + ... + 2953395465.

Almost surely, 2^212644470924 is an apocalyptic number.

It is an amenable number.

212644470924 is an abundant number, since it is smaller than the sum of its proper divisors (324873497336).

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

212644470924 is a wasteful number, since it uses less digits than its factorization.

212644470924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906790869 (or 5906790864 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 212644470924 in words is "two hundred twelve billion, six hundred forty-four million, four hundred seventy thousand, nine hundred twenty-four".