206138806875 has 40 divisors (see below), whose sum is σ = 381616406160. Its totient is φ = 109940688000.

The previous prime is 206138806829. The next prime is 206138806901. The reversal of 206138806875 is 578608831602.

It is not a de Polignac number, because 206138806875 - 2⁷ = 206138806747 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6090942 + ... + 6124691.

It is an arithmetic number, because the mean of its divisors is an integer number (9540410154).

Almost surely, 2^206138806875 is an apocalyptic number.

206138806875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

206138806875 is a deficient number, since it is larger than the sum of its proper divisors (175477599285).

206138806875 is an equidigital number, since it uses as much as digits as its factorization.

206138806875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12215662 (or 12215641 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 206138806875 in words is "two hundred six billion, one hundred thirty-eight million, eight hundred six thousand, eight hundred seventy-five".