728658578578 has 32 divisors (see below), whose sum is σ = 1333886376960. Its totient is φ = 291787634880.

The previous prime is 728658578563. The next prime is 728658578741. The reversal of 728658578578 is 875875856827.

It is a super-2 number, since 2×728658578578² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28934601 + ... + 28959772.

It is an arithmetic number, because the mean of its divisors is an integer number (41683949280).

Almost surely, 2^728658578578 is an apocalyptic number.

728658578578 is a deficient number, since it is larger than the sum of its proper divisors (605227798382).

728658578578 is a wasteful number, since it uses less digits than its factorization.

728658578578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57894442.

The product of its digits is 2107392000, while the sum is 76.

The spelling of 728658578578 in words is "seven hundred twenty-eight billion, six hundred fifty-eight million, five hundred seventy-eight thousand, five hundred seventy-eight".