77811139584 has 264 divisors, whose sum is σ = 238770923040. Its totient is φ = 24336433152.

The previous prime is 77811139573. The next prime is 77811139589. The reversal of 77811139584 is 48593111877.

It is a super-3 number, since 3×77811139584³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77811139584.

It is not an unprimeable number, because it can be changed into a prime (77811139589) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18734052 + ... + 18738204.

Almost surely, 2^77811139584 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77811139584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119385461520).

77811139584 is an abundant number, since it is smaller than the sum of its proper divisors (160959783456).

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

77811139584 is a wasteful number, since it uses less digits than its factorization.

77811139584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305 (or 4284 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The spelling of 77811139584 in words is "seventy-seven billion, eight hundred eleven million, one hundred thirty-nine thousand, five hundred eighty-four".