206975565979 has 48 divisors (see below), whose sum is σ = 270980544000. Its totient is φ = 154358949888.

The previous prime is 206975565977. The next prime is 206975565989. The reversal of 206975565979 is 979565579602.

It is not a de Polignac number, because 206975565979 - 2¹ = 206975565977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206975565977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4449787 + ... + 4496059.

It is an arithmetic number, because the mean of its divisors is an integer number (5645428000).

Almost surely, 2^206975565979 is an apocalyptic number.

206975565979 is a deficient number, since it is larger than the sum of its proper divisors (64004978021).

206975565979 is a wasteful number, since it uses less digits than its factorization.

206975565979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46524 (or 46511 counting only the distinct ones).

The product of its (nonzero) digits is 321489000, while the sum is 70.

The spelling of 206975565979 in words is "two hundred six billion, nine hundred seventy-five million, five hundred sixty-five thousand, nine hundred seventy-nine".