8421058407681 has 12 divisors (see below), whose sum is σ = 12692609774208. Its totient is φ = 5369950288824.

The previous prime is 8421058407667. The next prime is 8421058407689. The reversal of 8421058407681 is 1867048501248.

8421058407681 is a `hidden beast` number, since 8 + 42 + 10 + 584 + 0 + 7 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 8421058407681 - 2¹³ = 8421058399489 is a prime.

It is a super-2 number, since 2×8421058407681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8421058407689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20340720585 + ... + 20340720998.

It is an arithmetic number, because the mean of its divisors is an integer number (1057717481184).

Almost surely, 2^{8421058407681} is an apocalyptic number.

It is an amenable number.

8421058407681 is a deficient number, since it is larger than the sum of its proper divisors (4271551366527).

8421058407681 is a wasteful number, since it uses less digits than its factorization.

8421058407681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40681441612 (or 40681441609 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The spelling of 8421058407681 in words is "eight trillion, four hundred twenty-one billion, fifty-eight million, four hundred seven thousand, six hundred eighty-one".