28517414641 has 9 divisors (see below), whose sum is σ = 29145189451. Its totient is φ = 27902893072.

The previous prime is 28517414633. The next prime is 28517414657. The reversal of 28517414641 is 14641471582.

The square root of 28517414641 is 168871.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9058280625 + 19459134016 = 95175^2 + 139496^2 .

It is not a de Polignac number, because 28517414641 - 2³ = 28517414633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28517814641) 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 8 ways as a sum of consecutive naturals, for example, 7935141 + ... + 7938733.

Almost surely, 2^28517414641 is an apocalyptic number.

28517414641 is the 168871-st square number.

28517414641 is the 84436-th centered octagonal number.

It is an amenable number.

28517414641 is a deficient number, since it is larger than the sum of its proper divisors (627774810).

28517414641 is an frugal number, since it uses more digits than its factorization.

28517414641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7280 (or 3640 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The spelling of 28517414641 in words is "twenty-eight billion, five hundred seventeen million, four hundred fourteen thousand, six hundred forty-one".