640104210352 has 40 divisors (see below), whose sum is σ = 1254638737664. Its totient is φ = 316338364224.

The previous prime is 640104210329. The next prime is 640104210373. The reversal of 640104210352 is 253012401046.

It is a super-2 number, since 2×640104210352² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 640104210352.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490573 + ... + 1233235.

Almost surely, 2^640104210352 is an apocalyptic number.

It is an amenable number.

640104210352 is a deficient number, since it is larger than the sum of its proper divisors (614534527312).

640104210352 is a wasteful number, since it uses less digits than its factorization.

640104210352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743297 (or 743291 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 640104210352 its reverse (253012401046), we get a palindrome (893116611398).

The spelling of 640104210352 in words is "six hundred forty billion, one hundred four million, two hundred ten thousand, three hundred fifty-two".