8173893930521 has 16 divisors (see below), whose sum is σ = 8992473588288. Its totient is φ = 7429321340320.

The previous prime is 8173893930481. The next prime is 8173893930551. The reversal of 8173893930521 is 1250393983718.

It is a happy number.

It is not a de Polignac number, because 8173893930521 - 2³⁰ = 8172820188697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8173893930551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6045245 + ... + 7272741.

It is an arithmetic number, because the mean of its divisors is an integer number (562029599268).

Almost surely, 2^{8173893930521} is an apocalyptic number.

It is an amenable number.

8173893930521 is a deficient number, since it is larger than the sum of its proper divisors (818579657767).

8173893930521 is a wasteful number, since it uses less digits than its factorization.

8173893930521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232533 (or 1232511 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 8173893930521 in words is "eight trillion, one hundred seventy-three billion, eight hundred ninety-three million, nine hundred thirty thousand, five hundred twenty-one".