206820880872 has 16 divisors (see below), whose sum is σ = 517052202240. Its totient is φ = 68940293616.

The previous prime is 206820880859. The next prime is 206820880901. The reversal of 206820880872 is 278088028602.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4308768328 + ... + 4308768375.

It is an arithmetic number, because the mean of its divisors is an integer number (32315762640).

Almost surely, 2^206820880872 is an apocalyptic number.

It is an amenable number.

206820880872 is an abundant number, since it is smaller than the sum of its proper divisors (310231321368).

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

206820880872 is a wasteful number, since it uses less digits than its factorization.

206820880872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8617536712 (or 8617536708 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 51.

The spelling of 206820880872 in words is "two hundred six billion, eight hundred twenty million, eight hundred eighty thousand, eight hundred seventy-two".