664455045322236 has 192 divisors, whose sum is σ = 1880722342646784. Its totient is φ = 178238086656000.

The previous prime is 664455045322231. The next prime is 664455045322291. The reversal of 664455045322236 is 632223540554466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664455045322231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 971656390 + ... + 972339986.

It is an arithmetic number, because the mean of its divisors is an integer number (9795428867952).

Almost surely, 2^{664455045322236} 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 664455045322236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940361171323392).

664455045322236 is an abundant number, since it is smaller than the sum of its proper divisors (1216267297324548).

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

664455045322236 is a wasteful number, since it uses less digits than its factorization.

664455045322236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685300 (or 685298 counting only the distinct ones).

The product of its (nonzero) digits is 124416000, while the sum is 57.

The spelling of 664455045322236 in words is "six hundred sixty-four trillion, four hundred fifty-five billion, forty-five million, three hundred twenty-two thousand, two hundred thirty-six".