28566512506 has 16 divisors (see below), whose sum is σ = 49895149824. Its totient is φ = 12011794704.

The previous prime is 28566512501. The next prime is 28566512531. The reversal of 28566512506 is 60521566582.

It is not an unprimeable number, because it can be changed into a prime (28566512501) 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 7 ways as a sum of consecutive naturals, for example, 19248930 + ... + 19250413.

It is an arithmetic number, because the mean of its divisors is an integer number (3118446864).

Almost surely, 2^28566512506 is an apocalyptic number.

28566512506 is a deficient number, since it is larger than the sum of its proper divisors (21328637318).

28566512506 is a wasteful number, since it uses less digits than its factorization.

28566512506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38499405.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 28566512506 in words is "twenty-eight billion, five hundred sixty-six million, five hundred twelve thousand, five hundred six".