82155408680 has 16 divisors (see below), whose sum is σ = 184849669620. Its totient is φ = 32862163456.

The previous prime is 82155408677. The next prime is 82155408697. The reversal of 82155408680 is 8680455128.

It can be written as a sum of positive squares in 2 ways, for example, as 74672120644 + 7483288036 = 273262^2 + 86506^2 .

It is a super-2 number, since 2×82155408680² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026942569 + ... + 1026942648.

Almost surely, 2^82155408680 is an apocalyptic number.

It is an amenable number.

82155408680 is an abundant number, since it is smaller than the sum of its proper divisors (102694260940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82155408680 is a wasteful number, since it uses less digits than its factorization.

82155408680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053885228 (or 2053885224 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 82155408680 in words is "eighty-two billion, one hundred fifty-five million, four hundred eight thousand, six hundred eighty".