771691728052 has 192 divisors, whose sum is σ = 1718723059200. Its totient is φ = 295701719040.

The previous prime is 771691728007. The next prime is 771691728053. The reversal of 771691728052 is 250827196177.

771691728052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 771691727984 and 771691728002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771691728053) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 239579802 + ... + 239583022.

It is an arithmetic number, because the mean of its divisors is an integer number (8951682600).

Almost surely, 2^771691728052 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 771691728052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859361529600).

771691728052 is an abundant number, since it is smaller than the sum of its proper divisors (947031331148).

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

771691728052 is a wasteful number, since it uses less digits than its factorization.

771691728052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626 (or 3624 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 55.

The spelling of 771691728052 in words is "seven hundred seventy-one billion, six hundred ninety-one million, seven hundred twenty-eight thousand, fifty-two".