640514302630 has 16 divisors (see below), whose sum is σ = 1152979615440. Its totient is φ = 256193749792.

The previous prime is 640514302621. The next prime is 640514302633. The reversal of 640514302630 is 36203415046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640514302633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270060 + ... + 1701199.

It is an arithmetic number, because the mean of its divisors is an integer number (72061225965).

Almost surely, 2^640514302630 is an apocalyptic number.

640514302630 is a deficient number, since it is larger than the sum of its proper divisors (512465312810).

640514302630 is a wasteful number, since it uses less digits than its factorization.

640514302630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992823.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 640514302630 its reverse (36203415046), we get a palindrome (676717717676).

The spelling of 640514302630 in words is "six hundred forty billion, five hundred fourteen million, three hundred two thousand, six hundred thirty".