8223987864540 has 96 divisors (see below), whose sum is σ = 26377821517824. Its totient is φ = 1875407201280.

The previous prime is 8223987864509. The next prime is 8223987864551. The reversal of 8223987864540 is 454687893228.

It is a super-3 number, since 3×8223987864540³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22534669 + ... + 22896708.

It is an arithmetic number, because the mean of its divisors is an integer number (274768974144).

Almost surely, 2^{8223987864540} is an apocalyptic number.

It is an amenable number.

8223987864540 is an abundant number, since it is smaller than the sum of its proper divisors (18153833653284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8223987864540 is a wasteful number, since it uses less digits than its factorization.

8223987864540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45431827 (or 45431825 counting only the distinct ones).

The product of its (nonzero) digits is 185794560, while the sum is 66.

The spelling of 8223987864540 in words is "eight trillion, two hundred twenty-three billion, nine hundred eighty-seven million, eight hundred sixty-four thousand, five hundred forty".