83686004909 has 12 divisors (see below), whose sum is σ = 90737791092. Its totient is φ = 77146992000.

The previous prime is 83686004893. The next prime is 83686004939. The reversal of 83686004909 is 90940068638.

It can be written as a sum of positive squares in 6 ways, for example, as 53079552100 + 30606452809 = 230390^2 + 174947^2 .

It is not a de Polignac number, because 83686004909 - 2⁴ = 83686004893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83686004939) 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, 196742 + ... + 453959.

It is an arithmetic number, because the mean of its divisors is an integer number (7561482591).

Almost surely, 2^83686004909 is an apocalyptic number.

It is an amenable number.

83686004909 is a deficient number, since it is larger than the sum of its proper divisors (7051786183).

83686004909 is a wasteful number, since it uses less digits than its factorization.

83686004909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651488 (or 651475 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 83686004909 in words is "eighty-three billion, six hundred eighty-six million, four thousand, nine hundred nine".