206147643746 has 16 divisors (see below), whose sum is σ = 337995262080. Its totient is φ = 93519376080.

The previous prime is 206147643697. The next prime is 206147643763. The reversal of 206147643746 is 647346741602.

It is a junction number, because it is equal to n+sod(n) for n = 206147643694 and 206147643703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9193466 + ... + 9215861.

It is an arithmetic number, because the mean of its divisors is an integer number (21124703880).

Almost surely, 2^206147643746 is an apocalyptic number.

206147643746 is a deficient number, since it is larger than the sum of its proper divisors (131847618334).

206147643746 is a wasteful number, since it uses less digits than its factorization.

206147643746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18409849.

The product of its (nonzero) digits is 4064256, while the sum is 50.

The spelling of 206147643746 in words is "two hundred six billion, one hundred forty-seven million, six hundred forty-three thousand, seven hundred forty-six".