77886771445728 has 216 divisors, whose sum is σ = 260203238469720. Its totient is φ = 22033032537600.

The previous prime is 77886771445699. The next prime is 77886771445733. The reversal of 77886771445728 is 82754417768877.

77886771445728 is a `hidden beast` number, since 7 + 7 + 8 + 86 + 7 + 71 + 445 + 7 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25897398 + ... + 28748021.

It is an arithmetic number, because the mean of its divisors is an integer number (1204644622545).

Almost surely, 2^{77886771445728} is an apocalyptic number.

It is an amenable number.

77886771445728 is an abundant number, since it is smaller than the sum of its proper divisors (182316467023992).

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

77886771445728 is a wasteful number, since it uses less digits than its factorization.

77886771445728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54645550 (or 54645532 counting only the distinct ones).

The product of its digits is 8260976640, while the sum is 81.

The spelling of 77886771445728 in words is "seventy-seven trillion, eight hundred eighty-six billion, seven hundred seventy-one million, four hundred forty-five thousand, seven hundred twenty-eight".