80783838709 has 16 divisors (see below), whose sum is σ = 93379944960. Its totient is φ = 68451926400.

The previous prime is 80783838643. The next prime is 80783838727. The reversal of 80783838709 is 90783838708.

It is a cyclic number.

It is not a de Polignac number, because 80783838709 - 2⁷ = 80783838581 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 (80783838749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4446007 + ... + 4464139.

It is an arithmetic number, because the mean of its divisors is an integer number (5836246560).

Almost surely, 2^80783838709 is an apocalyptic number.

80783838709 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

80783838709 is a deficient number, since it is larger than the sum of its proper divisors (12596106251).

80783838709 is a wasteful number, since it uses less digits than its factorization.

80783838709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25380.

The product of its (nonzero) digits is 16257024, while the sum is 61.

Subtracting 80783838709 from its reverse (90783838708), we obtain a palindrome (9999999999).

The spelling of 80783838709 in words is "eighty billion, seven hundred eighty-three million, eight hundred thirty-eight thousand, seven hundred nine".