845619668 has 6 divisors (see below), whose sum is σ = 1479834426. Its totient is φ = 422809832.

The previous prime is 845619667. The next prime is 845619673. The reversal of 845619668 is 866916548.

It can be written as a sum of positive squares in only one way, i.e., 839724484 + 5895184 = 28978^2 + 2428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845619667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105702455 + ... + 105702462.

It is an arithmetic number, because the mean of its divisors is an integer number (246639071).

Almost surely, 2^845619668 is an apocalyptic number.

It is an amenable number.

845619668 is a deficient number, since it is larger than the sum of its proper divisors (634214758).

845619668 is a wasteful number, since it uses less digits than its factorization.

845619668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211404921 (or 211404919 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The square root of 845619668 is about 29079.5403677568. The cubic root of 845619668 is about 945.6382381638.

Subtracting from 845619668 its product of digits (2488320), we obtain a palindrome (843131348).

The spelling of 845619668 in words is "eight hundred forty-five million, six hundred nineteen thousand, six hundred sixty-eight".