83831440509 has 16 divisors (see below), whose sum is σ = 124217298240. Its totient is φ = 55877469840.

The previous prime is 83831440499. The next prime is 83831440523. The reversal of 83831440509 is 90504413838.

83831440509 is a `hidden beast` number, since 83 + 83 + 1 + 440 + 50 + 9 = 666.

It is not a de Polignac number, because 83831440509 - 2⁴ = 83831440493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83831440109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129327 + ... + 429404.

It is an arithmetic number, because the mean of its divisors is an integer number (7763581140).

Almost surely, 2^83831440509 is an apocalyptic number.

It is an amenable number.

83831440509 is a deficient number, since it is larger than the sum of its proper divisors (40385857731).

83831440509 is a wasteful number, since it uses less digits than its factorization.

83831440509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564297 (or 564291 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 83831440509 in words is "eighty-three billion, eight hundred thirty-one million, four hundred forty thousand, five hundred nine".