206121376872 has 48 divisors (see below), whose sum is σ = 558455545440. Its totient is φ = 68681261088.

The previous prime is 206121376849. The next prime is 206121376907. The reversal of 206121376872 is 278673121602.

206121376872 is a `hidden beast` number, since 20 + 612 + 1 + 3 + 7 + 6 + 8 + 7 + 2 = 666.

206121376872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11 ways as a sum of consecutive naturals, for example, 345778 + ... + 729249.

It is an arithmetic number, because the mean of its divisors is an integer number (11634490530).

Almost surely, 2^206121376872 is an apocalyptic number.

It is an amenable number.

206121376872 is an abundant number, since it is smaller than the sum of its proper divisors (352334168568).

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

206121376872 is a wasteful number, since it uses less digits than its factorization.

206121376872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077702 (or 1077695 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 206121376872 in words is "two hundred six billion, one hundred twenty-one million, three hundred seventy-six thousand, eight hundred seventy-two".