845670218661828 has 36 divisors (see below), whose sum is σ = 2443047298357120. Its totient is φ = 241620062474736.

The previous prime is 845670218661811. The next prime is 845670218661859. The reversal of 845670218661828 is 828166812076548.

It is a happy number.

845670218661828 is a `hidden beast` number, since 8 + 4 + 567 + 0 + 21 + 8 + 6 + 6 + 18 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1677917100268 + ... + 1677917100771.

Almost surely, 2^{845670218661828} is an apocalyptic number.

It is an amenable number.

845670218661828 is an abundant number, since it is smaller than the sum of its proper divisors (1597377079695292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

845670218661828 is a wasteful number, since it uses less digits than its factorization.

845670218661828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355834201056 (or 3355834201051 counting only the distinct ones).

The product of its (nonzero) digits is 495452160, while the sum is 72.

The spelling of 845670218661828 in words is "eight hundred forty-five trillion, six hundred seventy billion, two hundred eighteen million, six hundred sixty-one thousand, eight hundred twenty-eight".