640210417312 has 24 divisors (see below), whose sum is σ = 1264154382036. Its totient is φ = 319155336192.

The previous prime is 640210417291. The next prime is 640210417313. The reversal of 640210417312 is 213714012046.

It can be written as a sum of positive squares in 2 ways, for example, as 569004696976 + 71205720336 = 754324^2 + 266844^2 .

It is not an unprimeable number, because it can be changed into a prime (640210417313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29672563 + ... + 29694130.

Almost surely, 2^640210417312 is an apocalyptic number.

It is an amenable number.

640210417312 is a deficient number, since it is larger than the sum of its proper divisors (623943964724).

640210417312 is a wasteful number, since it uses less digits than its factorization.

640210417312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59367040 (or 59367032 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 640210417312 its reverse (213714012046), we get a palindrome (853924429358).

The spelling of 640210417312 in words is "six hundred forty billion, two hundred ten million, four hundred seventeen thousand, three hundred twelve".