728145546777 has 12 divisors (see below), whose sum is σ = 1147380861744. Its totient is φ = 441300331320.

The previous prime is 728145546773. The next prime is 728145546811. The reversal of 728145546777 is 777645541827.

It is a happy number.

728145546777 is a `hidden beast` number, since 7 + 2 + 8 + 1 + 4 + 554 + 6 + 7 + 77 = 666.

It is not a de Polignac number, because 728145546777 - 2² = 728145546773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728145546773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3677502663 + ... + 3677502860.

It is an arithmetic number, because the mean of its divisors is an integer number (95615071812).

Almost surely, 2^728145546777 is an apocalyptic number.

It is an amenable number.

728145546777 is a deficient number, since it is larger than the sum of its proper divisors (419235314967).

728145546777 is a wasteful number, since it uses less digits than its factorization.

728145546777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355005540 (or 7355005537 counting only the distinct ones).

The product of its digits is 92198400, while the sum is 63.

The spelling of 728145546777 in words is "seven hundred twenty-eight billion, one hundred forty-five million, five hundred forty-six thousand, seven hundred seventy-seven".