845500479121 has 3 divisors (see below), whose sum is σ = 845501398633. Its totient is φ = 845499559610.

The previous prime is 845500479067. The next prime is 845500479127. The reversal of 845500479121 is 121974005548.

The square root of 845500479121 is 919511.

It is a perfect power (a square), and thus also a powerful number.

845500479121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 is not a de Polignac number, because 845500479121 - 2²¹ = 845498381969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845500479127) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 459756 + ... + 1379266.

Almost surely, 2^845500479121 is an apocalyptic number.

845500479121 is the 919511-st square number.

845500479121 is the 459756-th centered octagonal number.

It is an amenable number.

845500479121 is a deficient number, since it is larger than the sum of its proper divisors (919512).

845500479121 is an frugal number, since it uses more digits than its factorization.

845500479121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839022 (or 919511 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 845500479121 in words is "eight hundred forty-five billion, five hundred million, four hundred seventy-nine thousand, one hundred twenty-one".