212644106432406 has 48 divisors (see below), whose sum is σ = 503449637837328. Its totient is φ = 64330390656000.

The previous prime is 212644106432369. The next prime is 212644106432413. The reversal of 212644106432406 is 604234601446212.

212644106432406 is a `hidden beast` number, since 2 + 1 + 264 + 4 + 1 + 0 + 64 + 324 + 0 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 893358651 + ... + 893596646.

It is an arithmetic number, because the mean of its divisors is an integer number (10488534121611).

Almost surely, 2^{212644106432406} is an apocalyptic number.

212644106432406 is an abundant number, since it is smaller than the sum of its proper divisors (290805531404922).

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

212644106432406 is a wasteful number, since it uses less digits than its factorization.

212644106432406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786955917 (or 1786955914 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 45.

Adding to 212644106432406 its reverse (604234601446212), we get a palindrome (816878707878618).

The spelling of 212644106432406 in words is "two hundred twelve trillion, six hundred forty-four billion, one hundred six million, four hundred thirty-two thousand, four hundred six".