7769968128 has 120 divisors (see below), whose sum is σ = 24149813688. Its totient is φ = 2390740992.

The previous prime is 7769968127. The next prime is 7769968139. The reversal of 7769968128 is 8218699677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7769968121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4950 + ... + 124757.

Almost surely, 2^7769968128 is an apocalyptic number.

7769968128 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7769968128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12074906844).

7769968128 is an abundant number, since it is smaller than the sum of its proper divisors (16379845560).

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

7769968128 is a wasteful number, since it uses less digits than its factorization.

7769968128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129744 (or 129725 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The square root of 7769968128 is about 88147.4226962990. The cubic root of 7769968128 is about 1980.6439533855.

The spelling of 7769968128 in words is "seven billion, seven hundred sixty-nine million, nine hundred sixty-eight thousand, one hundred twenty-eight".