640680440301 has 48 divisors (see below), whose sum is σ = 1015006666752. Its totient is φ = 386197610400.

The previous prime is 640680440299. The next prime is 640680440329. The reversal of 640680440301 is 103044086046.

640680440301 is a `hidden beast` number, since 640 + 6 + 8 + 0 + 4 + 4 + 0 + 3 + 0 + 1 = 666.

It is not a de Polignac number, because 640680440301 - 2¹ = 640680440299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640680441301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34729186 + ... + 34747628.

It is an arithmetic number, because the mean of its divisors is an integer number (21145972224).

Almost surely, 2^640680440301 is an apocalyptic number.

It is an amenable number.

640680440301 is a deficient number, since it is larger than the sum of its proper divisors (374326226451).

640680440301 is a wasteful number, since it uses less digits than its factorization.

640680440301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20334 (or 20331 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 640680440301 in words is "six hundred forty billion, six hundred eighty million, four hundred forty thousand, three hundred one".