28675775584561 has 24 divisors (see below), whose sum is σ = 33518630456064. Its totient is φ = 24460647140160.

The previous prime is 28675775584531. The next prime is 28675775584591. The reversal of 28675775584561 is 16548557757682.

It is an interprime number because it is at equal distance from previous prime (28675775584531) and next prime (28675775584591).

It is not a de Polignac number, because 28675775584561 - 2¹¹ = 28675775582513 is a prime.

It is a super-2 number, since 2×28675775584561² (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 (28675775584501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20689996 + ... + 22032418.

It is an arithmetic number, because the mean of its divisors is an integer number (1396609602336).

Almost surely, 2^{28675775584561} is an apocalyptic number.

It is an amenable number.

28675775584561 is a deficient number, since it is larger than the sum of its proper divisors (4842854871503).

28675775584561 is a wasteful number, since it uses less digits than its factorization.

28675775584561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344541 (or 1344534 counting only the distinct ones).

The product of its digits is 3951360000, while the sum is 76.

The spelling of 28675775584561 in words is "twenty-eight trillion, six hundred seventy-five billion, seven hundred seventy-five million, five hundred eighty-four thousand, five hundred sixty-one".