8021138154687 has 48 divisors (see below), whose sum is σ = 13269293227008. Its totient is φ = 4573800552960.

The previous prime is 8021138154683. The next prime is 8021138154739. The reversal of 8021138154687 is 7864518311208.

8021138154687 is a `hidden beast` number, since 8 + 0 + 2 + 1 + 13 + 8 + 1 + 546 + 87 = 666.

It is not a de Polignac number, because 8021138154687 - 2² = 8021138154683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021138154683) 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, 388591887 + ... + 388612527.

It is an arithmetic number, because the mean of its divisors is an integer number (276443608896).

Almost surely, 2^{8021138154687} is an apocalyptic number.

8021138154687 is a deficient number, since it is larger than the sum of its proper divisors (5248155072321).

8021138154687 is a wasteful number, since it uses less digits than its factorization.

8021138154687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33420 (or 33417 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 8021138154687 in words is "eight trillion, twenty-one billion, one hundred thirty-eight million, one hundred fifty-four thousand, six hundred eighty-seven".