82508309793 has 72 divisors (see below), whose sum is σ = 150697205568. Its totient is φ = 43113809088.

The previous prime is 82508309789. The next prime is 82508309833. The reversal of 82508309793 is 39790380528.

It is a happy number.

It is not a de Polignac number, because 82508309793 - 2² = 82508309789 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82508309783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 546180 + ... + 680682.

It is an arithmetic number, because the mean of its divisors is an integer number (2093016744).

Almost surely, 2^82508309793 is an apocalyptic number.

It is an amenable number.

82508309793 is a deficient number, since it is larger than the sum of its proper divisors (68188895775).

82508309793 is a wasteful number, since it uses less digits than its factorization.

82508309793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134643 (or 134633 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 82508309793 in words is "eighty-two billion, five hundred eight million, three hundred nine thousand, seven hundred ninety-three".