206142406457 has 12 divisors (see below), whose sum is σ = 230419920384. Its totient is φ = 184147058160.

The previous prime is 206142406417. The next prime is 206142406471. The reversal of 206142406457 is 754604241602.

It is a happy number.

It is not a de Polignac number, because 206142406457 - 2¹⁴ = 206142390073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206142406417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19668593 + ... + 19679070.

It is an arithmetic number, because the mean of its divisors is an integer number (19201660032).

Almost surely, 2^206142406457 is an apocalyptic number.

It is an amenable number.

206142406457 is a deficient number, since it is larger than the sum of its proper divisors (24277513927).

206142406457 is a wasteful number, since it uses less digits than its factorization.

206142406457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39347720 (or 39347707 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 206142406457 in words is "two hundred six billion, one hundred forty-two million, four hundred six thousand, four hundred fifty-seven".