645052436184 has 256 divisors, whose sum is σ = 1860515153280. Its totient is φ = 184607539200.

The previous prime is 645052436177. The next prime is 645052436213. The reversal of 645052436184 is 481634250546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 469811722 + ... + 469813094.

Almost surely, 2^645052436184 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645052436184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930257576640).

645052436184 is an abundant number, since it is smaller than the sum of its proper divisors (1215462717096).

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

645052436184 is a wasteful number, since it uses less digits than its factorization.

645052436184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390 (or 2386 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 645052436184 in words is "six hundred forty-five billion, fifty-two million, four hundred thirty-six thousand, one hundred eighty-four".