640301146442 has 8 divisors (see below), whose sum is σ = 960813207396. Its totient is φ = 320030077312.

The previous prime is 640301146351. The next prime is 640301146447. The reversal of 640301146442 is 244641103046.

It can be written as a sum of positive squares in 2 ways, for example, as 638431362361 + 1869784081 = 799019^2 + 43241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (640301146447) 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, 60241313 + ... + 60251940.

Almost surely, 2^640301146442 is an apocalyptic number.

640301146442 is a deficient number, since it is larger than the sum of its proper divisors (320512060954).

640301146442 is a wasteful number, since it uses less digits than its factorization.

640301146442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120495912.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 640301146442 its reverse (244641103046), we get a palindrome (884942249488).

The spelling of 640301146442 in words is "six hundred forty billion, three hundred one million, one hundred forty-six thousand, four hundred forty-two".