531336302640 has 1600 divisors, whose sum is σ = 2312162012160. Its totient is φ = 111168184320.

The previous prime is 531336302639. The next prime is 531336302663. The reversal of 531336302640 is 46203633135.

531336302640 is a `hidden beast` number, since 5 + 3 + 1 + 3 + 3 + 6 + 3 + 0 + 2 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 531336302595 and 531336302604.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 1813434334 + ... + 1813434626.

Almost surely, 2^531336302640 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 531336302640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156081006080).

531336302640 is an abundant number, since it is smaller than the sum of its proper divisors (1780825709520).

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

531336302640 is a wasteful number, since it uses less digits than its factorization.

531336302640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 36.

Adding to 531336302640 its reverse (46203633135), we get a palindrome (577539935775).

The spelling of 531336302640 in words is "five hundred thirty-one billion, three hundred thirty-six million, three hundred two thousand, six hundred forty".