77511258328 has 128 divisors (see below), whose sum is σ = 186459840000. Its totient is φ = 29405472768.

The previous prime is 77511258199. The next prime is 77511258343. The reversal of 77511258328 is 82385211577.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2498818 + ... + 2529646.

It is an arithmetic number, because the mean of its divisors is an integer number (1456717500).

Almost surely, 2^77511258328 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 77511258328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93229920000).

77511258328 is an abundant number, since it is smaller than the sum of its proper divisors (108948581672).

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

77511258328 is a wasteful number, since it uses less digits than its factorization.

77511258328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31017 (or 31013 counting only the distinct ones).

The product of its digits is 940800, while the sum is 49.

The spelling of 77511258328 in words is "seventy-seven billion, five hundred eleven million, two hundred fifty-eight thousand, three hundred twenty-eight".