640375241 has 8 divisors (see below), whose sum is σ = 698943168. Its totient is φ = 581866000.

The previous prime is 640375231. The next prime is 640375247. The reversal of 640375241 is 142573046.

640375241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640375241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640375198 and 640375207.

It is not an unprimeable number, because it can be changed into a prime (640375247) 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, 9956 + ... + 37146.

It is an arithmetic number, because the mean of its divisors is an integer number (87367896).

Almost surely, 2^640375241 is an apocalyptic number.

It is an amenable number.

640375241 is a deficient number, since it is larger than the sum of its proper divisors (58567927).

640375241 is a wasteful number, since it uses less digits than its factorization.

640375241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29343.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 640375241 is about 25305.6365460346. The cubic root of 640375241 is about 861.9422664879.

The spelling of 640375241 in words is "six hundred forty million, three hundred seventy-five thousand, two hundred forty-one".