82512115729 has 8 divisors (see below), whose sum is σ = 83155879368. Its totient is φ = 81868953600.

The previous prime is 82512115717. The next prime is 82512115733. The reversal of 82512115729 is 92751121528.

It can be written as a sum of positive squares in 4 ways, for example, as 36912784129 + 45599331600 = 192127^2 + 213540^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82512115729 - 2¹¹ = 82512113681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82512115799) 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 7 ways as a sum of consecutive naturals, for example, 127029 + ... + 425629.

It is an arithmetic number, because the mean of its divisors is an integer number (10394484921).

Almost surely, 2^82512115729 is an apocalyptic number.

It is an amenable number.

82512115729 is a deficient number, since it is larger than the sum of its proper divisors (643763639).

82512115729 is a wasteful number, since it uses less digits than its factorization.

82512115729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300755.

The product of its digits is 100800, while the sum is 43.

The spelling of 82512115729 in words is "eighty-two billion, five hundred twelve million, one hundred fifteen thousand, seven hundred twenty-nine".