206178381343 has 16 divisors (see below), whose sum is σ = 238239235584. Its totient is φ = 176345112960.

The previous prime is 206178381341. The next prime is 206178381359. The reversal of 206178381343 is 343183871602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 206178381343 - 2¹ = 206178381341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206178381293 and 206178381302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206178381341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318196 + ... + 716662.

It is an arithmetic number, because the mean of its divisors is an integer number (14889952224).

Almost surely, 2^206178381343 is an apocalyptic number.

206178381343 is a deficient number, since it is larger than the sum of its proper divisors (32060854241).

206178381343 is a wasteful number, since it uses less digits than its factorization.

206178381343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401262.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 206178381343 in words is "two hundred six billion, one hundred seventy-eight million, three hundred eighty-one thousand, three hundred forty-three".