804778553 has 8 divisors (see below), whose sum is σ = 826426368. Its totient is φ = 783370224.

The previous prime is 804778547. The next prime is 804778561. The reversal of 804778553 is 355877408.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 804778553 - 2⁶ = 804778489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 804778498 and 804778507.

It is not an unprimeable number, because it can be changed into a prime (804778253) 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, 53051 + ... + 66512.

It is an arithmetic number, because the mean of its divisors is an integer number (103303296).

Almost surely, 2^804778553 is an apocalyptic number.

It is an amenable number.

804778553 is a deficient number, since it is larger than the sum of its proper divisors (21647815).

804778553 is a wasteful number, since it uses less digits than its factorization.

804778553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119743.

The product of its (nonzero) digits is 940800, while the sum is 47.

The square root of 804778553 is about 28368.6191592048. The cubic root of 804778553 is about 930.1624385779.

The spelling of 804778553 in words is "eight hundred four million, seven hundred seventy-eight thousand, five hundred fifty-three".