640228914001 has 8 divisors (see below), whose sum is σ = 682439034600. Its totient is φ = 598524304128.

The previous prime is 640228913999. The next prime is 640228914019. The reversal of 640228914001 is 100419822046.

It can be written as a sum of positive squares in 4 ways, for example, as 173159183376 + 467069730625 = 416124^2 + 683425^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 640228914001 - 2¹ = 640228913999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640228914301) by changing a digit.

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, 126375066 + ... + 126380131.

It is an arithmetic number, because the mean of its divisors is an integer number (85304879325).

Almost surely, 2^640228914001 is an apocalyptic number.

It is an amenable number.

640228914001 is a deficient number, since it is larger than the sum of its proper divisors (42210120599).

640228914001 is a wasteful number, since it uses less digits than its factorization.

640228914001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252755363.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 640228914001 in words is "six hundred forty billion, two hundred twenty-eight million, nine hundred fourteen thousand, one".