28560532885553 has 4 divisors (see below), whose sum is σ = 30240564231780. Its totient is φ = 26880501539328.

The previous prime is 28560532885537. The next prime is 28560532885603. The reversal of 28560532885553 is 35558823506582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12718723934224 + 15841808951329 = 3566332^2 + 3980177^2 .

It is a cyclic number.

It is not a de Polignac number, because 28560532885553 - 2⁴ = 28560532885537 is a prime.

It is a super-2 number, since 2×28560532885553² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28560532885553.

It is not an unprimeable number, because it can be changed into a prime (28560532885513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840015673088 + ... + 840015673121.

It is an arithmetic number, because the mean of its divisors is an integer number (7560141057945).

Almost surely, 2^{28560532885553} is an apocalyptic number.

It is an amenable number.

28560532885553 is a deficient number, since it is larger than the sum of its proper divisors (1680031346227).

28560532885553 is a wasteful number, since it uses less digits than its factorization.

28560532885553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680031346226.

The product of its (nonzero) digits is 345600000, while the sum is 65.

The spelling of 28560532885553 in words is "twenty-eight trillion, five hundred sixty billion, five hundred thirty-two million, eight hundred eighty-five thousand, five hundred fifty-three".