28551666716 has 48 divisors (see below), whose sum is σ = 52143426720. Its totient is φ = 13667512320.

The previous prime is 28551666713. The next prime is 28551666739. The reversal of 28551666716 is 61766615582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551666713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2774156 + ... + 2784428.

It is an arithmetic number, because the mean of its divisors is an integer number (1086321390).

Almost surely, 2^28551666716 is an apocalyptic number.

It is an amenable number.

28551666716 is a deficient number, since it is larger than the sum of its proper divisors (23591760004).

28551666716 is a wasteful number, since it uses less digits than its factorization.

28551666716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10614 (or 10612 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 53.

The spelling of 28551666716 in words is "twenty-eight billion, five hundred fifty-one million, six hundred sixty-six thousand, seven hundred sixteen".