827549016021 has 48 divisors (see below), whose sum is σ = 1501222777600. Its totient is φ = 436509349920.

The previous prime is 827549015999. The next prime is 827549016053. The reversal of 827549016021 is 120610945728.

827549016021 is a `hidden beast` number, since 8 + 27 + 549 + 0 + 1 + 60 + 21 = 666.

It is not a de Polignac number, because 827549016021 - 2¹³ = 827549007829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827549016061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10270465 + ... + 10350726.

Almost surely, 2^827549016021 is an apocalyptic number.

It is an amenable number.

827549016021 is a deficient number, since it is larger than the sum of its proper divisors (673673761579).

827549016021 is a wasteful number, since it uses less digits than its factorization.

827549016021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20621231 (or 20621214 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 827549016021 in words is "eight hundred twenty-seven billion, five hundred forty-nine million, sixteen thousand, twenty-one".