845200553 has 4 divisors (see below), whose sum is σ = 845281620. Its totient is φ = 845119488.

The previous prime is 845200549. The next prime is 845200571. The reversal of 845200553 is 355002548.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 635443264 + 209757289 = 25208^2 + 14483^2 .

It is a cyclic number.

It is not a de Polignac number, because 845200553 - 2² = 845200549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845200453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22100 + ... + 46677.

It is an arithmetic number, because the mean of its divisors is an integer number (211320405).

Almost surely, 2^845200553 is an apocalyptic number.

It is an amenable number.

845200553 is a deficient number, since it is larger than the sum of its proper divisors (81067).

845200553 is a wasteful number, since it uses less digits than its factorization.

845200553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81066.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 845200553 is about 29072.3331193078. Note that the first 3 decimals coincide. The cubic root of 845200553 is about 945.4819832574.

The spelling of 845200553 in words is "eight hundred forty-five million, two hundred thousand, five hundred fifty-three".