640355203036 has 24 divisors (see below), whose sum is σ = 1144511081280. Its totient is φ = 313352590272.

The previous prime is 640355203001. The next prime is 640355203039. The reversal of 640355203036 is 630302553046.

640355203036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 640355202986 and 640355203004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640355203039) 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, 5975866 + ... + 6082078.

It is an arithmetic number, because the mean of its divisors is an integer number (47687961720).

Almost surely, 2^640355203036 is an apocalyptic number.

It is an amenable number.

640355203036 is a deficient number, since it is larger than the sum of its proper divisors (504155878244).

640355203036 is a wasteful number, since it uses less digits than its factorization.

640355203036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138333 (or 138331 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 37.

The spelling of 640355203036 in words is "six hundred forty billion, three hundred fifty-five million, two hundred three thousand, thirty-six".