78177235120481 has 12 divisors (see below), whose sum is σ = 90941200519680. Its totient is φ = 67008811703400.

The previous prime is 78177235120477. The next prime is 78177235120549. The reversal of 78177235120481 is 18402153277187.

It is not a de Polignac number, because 78177235120481 - 2² = 78177235120477 is a prime.

It is a super-3 number, since 3×78177235120481³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (78177235120441) 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 11 ways as a sum of consecutive naturals, for example, 11174840 + ... + 16769958.

It is an arithmetic number, because the mean of its divisors is an integer number (7578433376640).

Almost surely, 2^{78177235120481} is an apocalyptic number.

It is an amenable number.

78177235120481 is a deficient number, since it is larger than the sum of its proper divisors (12763965399199).

78177235120481 is a wasteful number, since it uses less digits than its factorization.

78177235120481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5880284 (or 5880277 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 56.

The spelling of 78177235120481 in words is "seventy-eight trillion, one hundred seventy-seven billion, two hundred thirty-five million, one hundred twenty thousand, four hundred eighty-one".