82180885636 has 6 divisors (see below), whose sum is σ = 143816549870. Its totient is φ = 41090442816.

The previous prime is 82180885571. The next prime is 82180885643. The reversal of 82180885636 is 63658808128.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61762190400 + 20418695236 = 248520^2 + 142894^2 .

It is a super-2 number, since 2×82180885636² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272610701 + ... + 10272610708.

Almost surely, 2^82180885636 is an apocalyptic number.

It is an amenable number.

82180885636 is a deficient number, since it is larger than the sum of its proper divisors (61635664234).

82180885636 is a wasteful number, since it uses less digits than its factorization.

82180885636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20545221413 (or 20545221411 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 82180885636 in words is "eighty-two billion, one hundred eighty million, eight hundred eighty-five thousand, six hundred thirty-six".