78181135338328 has 32 divisors (see below), whose sum is σ = 165074537963520. Its totient is φ = 34390528740000.

The previous prime is 78181135338287. The next prime is 78181135338401. The reversal of 78181135338328 is 82383353118187.

It is a super-2 number, since 2×78181135338328² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14329384248 + ... + 14329389703.

It is an arithmetic number, because the mean of its divisors is an integer number (5158579311360).

Almost surely, 2^{78181135338328} is an apocalyptic number.

It is an amenable number.

78181135338328 is an abundant number, since it is smaller than the sum of its proper divisors (86893402625192).

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

78181135338328 is a wasteful number, since it uses less digits than its factorization.

78181135338328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28658773999 (or 28658773995 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 61.

The spelling of 78181135338328 in words is "seventy-eight trillion, one hundred eighty-one billion, one hundred thirty-five million, three hundred thirty-eight thousand, three hundred twenty-eight".