28551782288961 has 24 divisors (see below), whose sum is σ = 43821733681440. Its totient is φ = 17851540427136.

The previous prime is 28551782288917. The next prime is 28551782288963. The reversal of 28551782288961 is 16988228715582.

28551782288961 is a `hidden beast` number, since 2 + 8 + 5 + 517 + 8 + 2 + 28 + 89 + 6 + 1 = 666.

It is not a de Polignac number, because 28551782288961 - 2⁷ = 28551782288833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28551782288961.

It is not an unprimeable number, because it can be changed into a prime (28551782288963) 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, 329661571 + ... + 329748168.

It is an arithmetic number, because the mean of its divisors is an integer number (1825905570060).

Almost surely, 2^{28551782288961} is an apocalyptic number.

It is an amenable number.

28551782288961 is a deficient number, since it is larger than the sum of its proper divisors (15269951392479).

28551782288961 is a wasteful number, since it uses less digits than its factorization.

28551782288961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659410045 (or 659410042 counting only the distinct ones).

The product of its digits is 309657600, while the sum is 72.

The spelling of 28551782288961 in words is "twenty-eight trillion, five hundred fifty-one billion, seven hundred eighty-two million, two hundred eighty-eight thousand, nine hundred sixty-one".