804420655557 has 8 divisors (see below), whose sum is σ = 1072763150784. Its totient is φ = 536179298688.

The previous prime is 804420655481. The next prime is 804420655561. The reversal of 804420655557 is 755556024408.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 804420655557 - 2²⁰ = 804419606981 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804420655657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25266028 + ... + 25297845.

It is an arithmetic number, because the mean of its divisors is an integer number (134095393848).

Almost surely, 2^804420655557 is an apocalyptic number.

It is an amenable number.

804420655557 is a deficient number, since it is larger than the sum of its proper divisors (268342495227).

804420655557 is a wasteful number, since it uses less digits than its factorization.

804420655557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50569179.

The product of its (nonzero) digits is 6720000, while the sum is 51.

The spelling of 804420655557 in words is "eight hundred four billion, four hundred twenty million, six hundred fifty-five thousand, five hundred fifty-seven".