805604555057 has 2 divisors, whose sum is σ = 805604555058. Its totient is φ = 805604555056.

The previous prime is 805604555053. The next prime is 805604555141. The reversal of 805604555057 is 750555406508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 729331372081 + 76273182976 = 854009^2 + 276176^2 .

It is a cyclic number.

It is not a de Polignac number, because 805604555057 - 2² = 805604555053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 805604554996 and 805604555014.

It is not a weakly prime, because it can be changed into another prime (805604555053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402802277528 + 402802277529.

It is an arithmetic number, because the mean of its divisors is an integer number (402802277529).

Almost surely, 2^805604555057 is an apocalyptic number.

It is an amenable number.

805604555057 is a deficient number, since it is larger than the sum of its proper divisors (1).

805604555057 is an equidigital number, since it uses as much as digits as its factorization.

805604555057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200000, while the sum is 50.

The spelling of 805604555057 in words is "eight hundred five billion, six hundred four million, five hundred fifty-five thousand, fifty-seven".