805604554987 has 2 divisors, whose sum is σ = 805604554988. Its totient is φ = 805604554986.

The previous prime is 805604554897. The next prime is 805604555053. The reversal of 805604554987 is 789455406508.

Together with previous prime (805604554897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 805604554987 - 2¹¹ = 805604552939 is a prime.

It is not a weakly prime, because it can be changed into another prime (805604554087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402802277493 + 402802277494.

It is an arithmetic number, because the mean of its divisors is an integer number (402802277494).

Almost surely, 2^805604554987 is an apocalyptic number.

805604554987 is a deficient number, since it is larger than the sum of its proper divisors (1).

805604554987 is an equidigital number, since it uses as much as digits as its factorization.

805604554987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384000, while the sum is 61.

The spelling of 805604554987 in words is "eight hundred five billion, six hundred four million, five hundred fifty-four thousand, nine hundred eighty-seven".