212688945538 has 32 divisors (see below), whose sum is σ = 325729797120. Its totient is φ = 104127550800.

The previous prime is 212688945509. The next prime is 212688945571. The reversal of 212688945538 is 835549886212.

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 15 ways as a sum of consecutive naturals, for example, 32463363 + ... + 32469913.

It is an arithmetic number, because the mean of its divisors is an integer number (10179056160).

Almost surely, 2^212688945538 is an apocalyptic number.

212688945538 is a deficient number, since it is larger than the sum of its proper divisors (113040851582).

212688945538 is a wasteful number, since it uses less digits than its factorization.

212688945538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662.

The product of its digits is 33177600, while the sum is 61.

The spelling of 212688945538 in words is "two hundred twelve billion, six hundred eighty-eight million, nine hundred forty-five thousand, five hundred thirty-eight".