77734141728 has 24 divisors (see below), whose sum is σ = 204052122288. Its totient is φ = 25911380544.

The previous prime is 77734141711. The next prime is 77734141759. The reversal of 77734141728 is 82714143777.

It is a tau number, because it is divible by the number of its divisors (24).

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, 404865226 + ... + 404865417.

It is an arithmetic number, because the mean of its divisors is an integer number (8502171762).

Almost surely, 2^77734141728 is an apocalyptic number.

It is an amenable number.

77734141728 is an abundant number, since it is smaller than the sum of its proper divisors (126317980560).

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

77734141728 is a wasteful number, since it uses less digits than its factorization.

77734141728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809730656 (or 809730648 counting only the distinct ones).

The product of its digits is 1843968, while the sum is 51.

The spelling of 77734141728 in words is "seventy-seven billion, seven hundred thirty-four million, one hundred forty-one thousand, seven hundred twenty-eight".