78530826586181 has 8 divisors (see below), whose sum is σ = 79368789268440. Its totient is φ = 77693442812928.

The previous prime is 78530826586171. The next prime is 78530826586217. The reversal of 78530826586181 is 18168562803587.

It can be written as a sum of positive squares in 4 ways, for example, as 1202827660225 + 77327998925956 = 1096735^2 + 8793634^2 .

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 78530826586181 - 2¹⁰ = 78530826585157 is a prime.

It is a super-5 number, since 5×78530826586181⁵ (a number of 71 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78530826586141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144454496 + ... + 144997113.

It is an arithmetic number, because the mean of its divisors is an integer number (9921098658555).

Almost surely, 2^{78530826586181} is an apocalyptic number.

It is an amenable number.

78530826586181 is a deficient number, since it is larger than the sum of its proper divisors (837962682259).

78530826586181 is a wasteful number, since it uses less digits than its factorization.

78530826586181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289454503.

The product of its (nonzero) digits is 154828800, while the sum is 68.

The spelling of 78530826586181 in words is "seventy-eight trillion, five hundred thirty billion, eight hundred twenty-six million, five hundred eighty-six thousand, one hundred eighty-one".