853278561 has 24 divisors (see below), whose sum is σ = 1260814464. Its totient is φ = 555830880.

The previous prime is 853278551. The next prime is 853278589. The reversal of 853278561 is 165872358.

853278561 is a `hidden beast` number, since 85 + 3 + 2 + 7 + 8 + 561 = 666.

It is not a de Polignac number, because 853278561 - 2¹⁴ = 853262177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (853278521) 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, 335866 + ... + 338396.

It is an arithmetic number, because the mean of its divisors is an integer number (52533936).

Almost surely, 2^853278561 is an apocalyptic number.

It is an amenable number.

853278561 is a deficient number, since it is larger than the sum of its proper divisors (407535903).

853278561 is a wasteful number, since it uses less digits than its factorization.

853278561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381 (or 3378 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 853278561 is about 29210.9322172368. The cubic root of 853278561 is about 948.4845870813.

The spelling of 853278561 in words is "eight hundred fifty-three million, two hundred seventy-eight thousand, five hundred sixty-one".