7728604081779 has 16 divisors (see below), whose sum is σ = 11779319709440. Its totient is φ = 4415445488160.

The previous prime is 7728604081771. The next prime is 7728604081817. The reversal of 7728604081779 is 9771804068277.

It is not a de Polignac number, because 7728604081779 - 2³ = 7728604081771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7728604081771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37382017 + ... + 37588194.

It is an arithmetic number, because the mean of its divisors is an integer number (736207481840).

Almost surely, 2^{7728604081779} is an apocalyptic number.

7728604081779 is a deficient number, since it is larger than the sum of its proper divisors (4050715627661).

7728604081779 is a wasteful number, since it uses less digits than its factorization.

7728604081779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74975130.

The product of its (nonzero) digits is 66382848, while the sum is 66.

The spelling of 7728604081779 in words is "seven trillion, seven hundred twenty-eight billion, six hundred four million, eighty-one thousand, seven hundred seventy-nine".