1009668856789 has 8 divisors (see below), whose sum is σ = 1031188691520. Its totient is φ = 988295915616.

The previous prime is 1009668856727. The next prime is 1009668856843. The reversal of 1009668856789 is 9876588669001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1009668856789 - 2⁷ = 1009668856661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009668856709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36709497 + ... + 36736990.

It is an arithmetic number, because the mean of its divisors is an integer number (128898586440).

Almost surely, 2^{1009668856789} is an apocalyptic number.

It is an amenable number.

1009668856789 is a deficient number, since it is larger than the sum of its proper divisors (21519834731).

1009668856789 is an equidigital number, since it uses as much as digits as its factorization.

1009668856789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73446779.

The product of its (nonzero) digits is 313528320, while the sum is 73.

The spelling of 1009668856789 in words is "one trillion, nine billion, six hundred sixty-eight million, eight hundred fifty-six thousand, seven hundred eighty-nine".