28011664136 has 16 divisors (see below), whose sum is σ = 52526815440. Its totient is φ = 14004513360.

The previous prime is 28011664123. The next prime is 28011664141. The reversal of 28011664136 is 63146611082.

It is a self number, because there is not a number n which added to its sum of digits gives 28011664136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71450 + ... + 247241.

It is an arithmetic number, because the mean of its divisors is an integer number (3282925965).

Almost surely, 2^28011664136 is an apocalyptic number.

It is an amenable number.

28011664136 is a deficient number, since it is larger than the sum of its proper divisors (24515151304).

28011664136 is a wasteful number, since it uses less digits than its factorization.

28011664136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329684 (or 329680 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 28011664136 in words is "twenty-eight billion, eleven million, six hundred sixty-four thousand, one hundred thirty-six".