28534684664 has 8 divisors (see below), whose sum is σ = 53502533760. Its totient is φ = 14267342328.

The previous prime is 28534684561. The next prime is 28534684687. The reversal of 28534684664 is 46648643582.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×28534684664³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1783417784 + ... + 1783417799.

It is an arithmetic number, because the mean of its divisors is an integer number (6687816720).

Almost surely, 2^28534684664 is an apocalyptic number.

It is an amenable number.

28534684664 is a deficient number, since it is larger than the sum of its proper divisors (24967849096).

28534684664 is a wasteful number, since it uses less digits than its factorization.

28534684664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566835589 (or 3566835585 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 56.

The spelling of 28534684664 in words is "twenty-eight billion, five hundred thirty-four million, six hundred eighty-four thousand, six hundred sixty-four".