212156323215826 has 48 divisors (see below), whose sum is σ = 376648578663840. Its totient is φ = 89223723248000.

The previous prime is 212156323215779. The next prime is 212156323215883. The reversal of 212156323215826 is 628512323651212.

It is a self number, because there is not a number n which added to its sum of digits gives 212156323215826.

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, 436785700 + ... + 437271151.

It is an arithmetic number, because the mean of its divisors is an integer number (7846845388830).

Almost surely, 2^{212156323215826} is an apocalyptic number.

212156323215826 is a deficient number, since it is larger than the sum of its proper divisors (164492255448014).

212156323215826 is a wasteful number, since it uses less digits than its factorization.

212156323215826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874056951 (or 874056940 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 49.

The spelling of 212156323215826 in words is "two hundred twelve trillion, one hundred fifty-six billion, three hundred twenty-three million, two hundred fifteen thousand, eight hundred twenty-six".