27649834821 has 24 divisors (see below), whose sum is σ = 46877801984. Its totient is φ = 15372879840.

The previous prime is 27649834699. The next prime is 27649834831. The reversal of 27649834821 is 12843894672.

27649834821 is a `hidden beast` number, since 2 + 76 + 4 + 98 + 3 + 482 + 1 = 666.

It is not a de Polignac number, because 27649834821 - 2²⁶ = 27582725957 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27649834831) 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 23 ways as a sum of consecutive naturals, for example, 5928565 + ... + 5933226.

Almost surely, 2^27649834821 is an apocalyptic number.

27649834821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27649834821 is a deficient number, since it is larger than the sum of its proper divisors (19227967163).

27649834821 is a wasteful number, since it uses less digits than its factorization.

27649834821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11861841 (or 11861838 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 27649834821 in words is "twenty-seven billion, six hundred forty-nine million, eight hundred thirty-four thousand, eight hundred twenty-one".