783980920809 has 12 divisors (see below), whose sum is σ = 1132430945776. Its totient is φ = 522647457912.

The previous prime is 783980920787. The next prime is 783980920847. The reversal of 783980920809 is 908029089387.

It is not a de Polignac number, because 783980920809 - 2⁸ = 783980920553 is a prime.

It is a super-2 number, since 2×783980920809² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (783980920909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291834 + ... + 1285740.

Almost surely, 2^783980920809 is an apocalyptic number.

It is an amenable number.

783980920809 is a deficient number, since it is larger than the sum of its proper divisors (348450024967).

783980920809 is a wasteful number, since it uses less digits than its factorization.

783980920809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081556 (or 1081553 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The spelling of 783980920809 in words is "seven hundred eighty-three billion, nine hundred eighty million, nine hundred twenty thousand, eight hundred nine".