28161853929 has 28 divisors (see below), whose sum is σ = 46061975472. Its totient is φ = 17067785400.

The previous prime is 28161853921. The next prime is 28161853949. The reversal of 28161853929 is 92935816182.

28161853929 is a `hidden beast` number, since 2 + 81 + 6 + 1 + 8 + 539 + 29 = 666.

It is not a de Polignac number, because 28161853929 - 2³ = 28161853921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28161853921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1747927 + ... + 1763964.

Almost surely, 2^28161853929 is an apocalyptic number.

It is an amenable number.

28161853929 is a deficient number, since it is larger than the sum of its proper divisors (17900121543).

28161853929 is an equidigital number, since it uses as much as digits as its factorization.

28161853929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511920 (or 3511905 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The spelling of 28161853929 in words is "twenty-eight billion, one hundred sixty-one million, eight hundred fifty-three thousand, nine hundred twenty-nine".