206440536043 has 4 divisors (see below), whose sum is σ = 235932041200. Its totient is φ = 176949030888.

The previous prime is 206440535957. The next prime is 206440536079. The reversal of 206440536043 is 340635044602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206440536043 - 2²¹ = 206438438891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206440535993 and 206440536011.

It is not an unprimeable number, because it can be changed into a prime (206440636043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14745752568 + ... + 14745752581.

It is an arithmetic number, because the mean of its divisors is an integer number (58983010300).

Almost surely, 2^206440536043 is an apocalyptic number.

206440536043 is a deficient number, since it is larger than the sum of its proper divisors (29491505157).

206440536043 is an equidigital number, since it uses as much as digits as its factorization.

206440536043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29491505156.

The product of its (nonzero) digits is 207360, while the sum is 37.

The spelling of 206440536043 in words is "two hundred six billion, four hundred forty million, five hundred thirty-six thousand, forty-three".