640228125010 has 16 divisors (see below), whose sum is σ = 1152448888536. Its totient is φ = 256082747008.

The previous prime is 640228124933. The next prime is 640228125029. The reversal of 640228125010 is 10521822046.

It can be written as a sum of positive squares in 4 ways, for example, as 377675389809 + 262552735201 = 614553^2 + 512399^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742027 + ... + 1353166.

Almost surely, 2^640228125010 is an apocalyptic number.

640228125010 is a deficient number, since it is larger than the sum of its proper divisors (512220763526).

640228125010 is a wasteful number, since it uses less digits than its factorization.

640228125010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125757.

The product of its (nonzero) digits is 7680, while the sum is 31.

Adding to 640228125010 its reverse (10521822046), we get a palindrome (650749947056).

The spelling of 640228125010 in words is "six hundred forty billion, two hundred twenty-eight million, one hundred twenty-five thousand, ten".