641650936 has 8 divisors (see below), whose sum is σ = 1203095520. Its totient is φ = 320825464.

The previous prime is 641650931. The next prime is 641650979. The reversal of 641650936 is 639056146.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641650931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40103176 + ... + 40103191.

It is an arithmetic number, because the mean of its divisors is an integer number (150386940).

Almost surely, 2^641650936 is an apocalyptic number.

It is an amenable number.

641650936 is a deficient number, since it is larger than the sum of its proper divisors (561444584).

641650936 is a wasteful number, since it uses less digits than its factorization.

641650936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80206373 (or 80206369 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 641650936 is about 25330.8297534842. The cubic root of 641650936 is about 862.5142467996.

The spelling of 641650936 in words is "six hundred forty-one million, six hundred fifty thousand, nine hundred thirty-six".