206605878892 has 36 divisors (see below), whose sum is σ = 422189848080. Its totient is φ = 88208680224.

The previous prime is 206605878859. The next prime is 206605878929. The reversal of 206605878892 is 298878506602.

It is a super-2 number, since 2×206605878892² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206605878892.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1952467 + ... + 2055562.

It is an arithmetic number, because the mean of its divisors is an integer number (11727495780).

Almost surely, 2^206605878892 is an apocalyptic number.

It is an amenable number.

206605878892 is an abundant number, since it is smaller than the sum of its proper divisors (215583969188).

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

206605878892 is a wasteful number, since it uses less digits than its factorization.

206605878892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008310 (or 4008301 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 206605878892 in words is "two hundred six billion, six hundred five million, eight hundred seventy-eight thousand, eight hundred ninety-two".