8204865478556 has 6 divisors (see below), whose sum is σ = 14358514587480. Its totient is φ = 4102432739276.

The previous prime is 8204865478541. The next prime is 8204865478619. The reversal of 8204865478556 is 6558745684028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025608184816 + ... + 1025608184823.

It is an arithmetic number, because the mean of its divisors is an integer number (2393085764580).

Almost surely, 2^{8204865478556} is an apocalyptic number.

It is an amenable number.

8204865478556 is a deficient number, since it is larger than the sum of its proper divisors (6153649108924).

8204865478556 is a wasteful number, since it uses less digits than its factorization.

8204865478556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051216369643 (or 2051216369641 counting only the distinct ones).

The product of its (nonzero) digits is 516096000, while the sum is 68.

The spelling of 8204865478556 in words is "eight trillion, two hundred four billion, eight hundred sixty-five million, four hundred seventy-eight thousand, five hundred fifty-six".