8063445661821 has 32 divisors (see below), whose sum is σ = 13384043049600. Its totient is φ = 4754857386240.

The previous prime is 8063445661787. The next prime is 8063445661829. The reversal of 8063445661821 is 1281665443608.

8063445661821 is a `hidden beast` number, since 8 + 0 + 6 + 3 + 4 + 456 + 6 + 182 + 1 = 666.

It is not a de Polignac number, because 8063445661821 - 2¹⁰ = 8063445660797 is a prime.

It is a super-2 number, since 2×8063445661821² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8063445661829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366876156 + ... + 366898133.

It is an arithmetic number, because the mean of its divisors is an integer number (418251345300).

Almost surely, 2^{8063445661821} is an apocalyptic number.

It is an amenable number.

8063445661821 is a deficient number, since it is larger than the sum of its proper divisors (5320597387779).

8063445661821 is a wasteful number, since it uses less digits than its factorization.

8063445661821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733774346 (or 733774340 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 8063445661821 in words is "eight trillion, sixty-three billion, four hundred forty-five million, six hundred sixty-one thousand, eight hundred twenty-one".