77328671784 has 256 divisors, whose sum is σ = 242864455680. Its totient is φ = 19974712320.

The previous prime is 77328671753. The next prime is 77328671821. The reversal of 77328671784 is 48717682377.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35036809 + ... + 35039015.

It is an arithmetic number, because the mean of its divisors is an integer number (948689280).

Almost surely, 2^77328671784 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 77328671784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121432227840).

77328671784 is an abundant number, since it is smaller than the sum of its proper divisors (165535783896).

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

77328671784 is a wasteful number, since it uses less digits than its factorization.

77328671784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560 (or 2556 counting only the distinct ones).

The product of its digits is 22127616, while the sum is 60.

It can be divided in two parts, 773286717 and 84, that added together give a triangular number (773286801 = T₃₉₃₂₆).

The spelling of 77328671784 in words is "seventy-seven billion, three hundred twenty-eight million, six hundred seventy-one thousand, seven hundred eighty-four".