209429502768 has 60 divisors (see below), whose sum is σ = 606322494960. Its totient is φ = 67402597248.

The previous prime is 209429502727. The next prime is 209429502787. The reversal of 209429502768 is 867205924902.

209429502768 is a `hidden beast` number, since 20 + 9 + 42 + 9 + 502 + 76 + 8 = 666.

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, 25071196 + ... + 25079547.

It is an arithmetic number, because the mean of its divisors is an integer number (10105374916).

Almost surely, 2^209429502768 is an apocalyptic number.

It is an amenable number.

209429502768 is an abundant number, since it is smaller than the sum of its proper divisors (396892992192).

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

209429502768 is a wasteful number, since it uses less digits than its factorization.

209429502768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50150786 (or 50150777 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 209429502768 in words is "two hundred nine billion, four hundred twenty-nine million, five hundred two thousand, seven hundred sixty-eight".