77728705526684 has 12 divisors (see below), whose sum is σ = 136030945625400. Its totient is φ = 38862721062288.

The previous prime is 77728705526671. The next prime is 77728705526723. The reversal of 77728705526684 is 48662550782777.

77728705526684 is digitally balanced in base 3 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407818079 + ... + 408008630.

It is an arithmetic number, because the mean of its divisors is an integer number (11335912135450).

Almost surely, 2^{77728705526684} is an apocalyptic number.

It is an amenable number.

77728705526684 is a deficient number, since it is larger than the sum of its proper divisors (58302240098716).

77728705526684 is a wasteful number, since it uses less digits than its factorization.

77728705526684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815850532 (or 815850530 counting only the distinct ones).

The product of its (nonzero) digits is 2212761600, while the sum is 74.

The spelling of 77728705526684 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred five million, five hundred twenty-six thousand, six hundred eighty-four".