640241071277 has 4 divisors (see below), whose sum is σ = 655130398560. Its totient is φ = 625351743996.

The previous prime is 640241071243. The next prime is 640241071307. The reversal of 640241071277 is 772170142046.

640241071277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 640241071277 - 2¹⁸ = 640240809133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640241079277) 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, 7444663577 + ... + 7444663662.

It is an arithmetic number, because the mean of its divisors is an integer number (163782599640).

Almost surely, 2^640241071277 is an apocalyptic number.

It is an amenable number.

640241071277 is a deficient number, since it is larger than the sum of its proper divisors (14889327283).

640241071277 is a wasteful number, since it uses less digits than its factorization.

640241071277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14889327282.

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 640241071277 in words is "six hundred forty billion, two hundred forty-one million, seventy-one thousand, two hundred seventy-seven".