82305170642 has 18 divisors (see below), whose sum is σ = 131158157583. Its totient is φ = 38728599232.

The previous prime is 82305170639. The next prime is 82305170683. The reversal of 82305170642 is 24607150328.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 81311092801 + 994077841 = 285151^2 + 31529^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=202861.

It is a super-2 number, since 2×82305170642² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82305170596 and 82305170605.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6891308 + ... + 6903240.

Almost surely, 2^82305170642 is an apocalyptic number.

82305170642 is a deficient number, since it is larger than the sum of its proper divisors (48852986941).

82305170642 is an frugal number, since it uses more digits than its factorization.

82305170642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23902 (or 11952 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 82305170642 in words is "eighty-two billion, three hundred five million, one hundred seventy thousand, six hundred forty-two".