206542702506 has 24 divisors (see below), whose sum is σ = 480527920800. Its totient is φ = 59012200632.

The previous prime is 206542702463. The next prime is 206542702537. The reversal of 206542702506 is 605207245602.

206542702506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351262806 + ... + 351263393.

It is an arithmetic number, because the mean of its divisors is an integer number (20021996700).

Almost surely, 2^206542702506 is an apocalyptic number.

206542702506 is an abundant number, since it is smaller than the sum of its proper divisors (273985218294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206542702506 is a wasteful number, since it uses less digits than its factorization.

206542702506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702526218 (or 702526211 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 206542702506 in words is "two hundred six billion, five hundred forty-two million, seven hundred two thousand, five hundred six".