845599553 has 2 divisors, whose sum is σ = 845599554. Its totient is φ = 845599552.

The previous prime is 845599529. The next prime is 845599561. The reversal of 845599553 is 355995548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623351089 + 222248464 = 24967^2 + 14908^2 .

It is a cyclic number.

It is not a de Polignac number, because 845599553 - 2¹⁰ = 845598529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 845599495 and 845599504.

It is not a weakly prime, because it can be changed into another prime (845599523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422799776 + 422799777.

It is an arithmetic number, because the mean of its divisors is an integer number (422799777).

Almost surely, 2^845599553 is an apocalyptic number.

It is an amenable number.

845599553 is a deficient number, since it is larger than the sum of its proper divisors (1).

845599553 is an equidigital number, since it uses as much as digits as its factorization.

845599553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860000, while the sum is 53.

The square root of 845599553 is about 29079.1945039748. The cubic root of 845599553 is about 945.6307400474.

The spelling of 845599553 in words is "eight hundred forty-five million, five hundred ninety-nine thousand, five hundred fifty-three".