28545714866761 has 81 divisors (see below), whose sum is σ = 31972487125383. Its totient is φ = 25481399800320.

The previous prime is 28545714866681. The next prime is 28545714866783. The reversal of 28545714866761 is 16766841754582.

The square root of 28545714866761 is 5342819.

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., 6916295113225 + 21629419753536 = 2629885^2 + 4650744^2 .

It is not a de Polignac number, because 28545714866761 - 2⁷ = 28545714866633 is a prime.

It is a super-2 number, since 2×28545714866761² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28545714866161) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 147905258281 + ... + 147905258473.

Almost surely, 2^{28545714866761} is an apocalyptic number.

28545714866761 is the 5342819-th square number.

28545714866761 is the 2671410-th centered octagonal number.

It is an amenable number.

28545714866761 is a deficient number, since it is larger than the sum of its proper divisors (3426772258622).

28545714866761 is an frugal number, since it uses more digits than its factorization.

28545714866761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 290 counting only the distinct ones).

The product of its digits is 541900800, while the sum is 70.

The spelling of 28545714866761 in words is "twenty-eight trillion, five hundred forty-five billion, seven hundred fourteen million, eight hundred sixty-six thousand, seven hundred sixty-one".