640963598355 has 12 divisors (see below), whose sum is σ = 1111003570560. Its totient is φ = 341847252432.

The previous prime is 640963598239. The next prime is 640963598369. The reversal of 640963598355 is 553895369046.

640963598355 is a `hidden beast` number, since 6 + 4 + 0 + 9 + 6 + 3 + 598 + 35 + 5 = 666.

It is not a de Polignac number, because 640963598355 - 2⁷ = 640963598227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640963598292 and 640963598301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7121817715 + ... + 7121817804.

It is an arithmetic number, because the mean of its divisors is an integer number (92583630880).

Almost surely, 2^640963598355 is an apocalyptic number.

640963598355 is a deficient number, since it is larger than the sum of its proper divisors (470039972205).

640963598355 is a wasteful number, since it uses less digits than its factorization.

640963598355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243635530 (or 14243635527 counting only the distinct ones).

The product of its (nonzero) digits is 104976000, while the sum is 63.

The spelling of 640963598355 in words is "six hundred forty billion, nine hundred sixty-three million, five hundred ninety-eight thousand, three hundred fifty-five".