609781868 has 6 divisors (see below), whose sum is σ = 1067118276. Its totient is φ = 304890932.

The previous prime is 609781847. The next prime is 609781871. The reversal of 609781868 is 868187906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76222730 + ... + 76222737.

It is an arithmetic number, because the mean of its divisors is an integer number (177853046).

Almost surely, 2^609781868 is an apocalyptic number.

It is an amenable number.

609781868 is a deficient number, since it is larger than the sum of its proper divisors (457336408).

609781868 is a wasteful number, since it uses less digits than its factorization.

609781868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152445471 (or 152445469 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 609781868 is about 24693.7617223460. The cubic root of 609781868 is about 847.9915060114.

The spelling of 609781868 in words is "six hundred nine million, seven hundred eighty-one thousand, eight hundred sixty-eight".