641536706 has 16 divisors (see below), whose sum is σ = 968008320. Its totient is φ = 318872400.

The previous prime is 641536681. The next prime is 641536781. The reversal of 641536706 is 607635146.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 641536706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501740 + ... + 503016.

It is an arithmetic number, because the mean of its divisors is an integer number (60500520).

Almost surely, 2^641536706 is an apocalyptic number.

641536706 is a deficient number, since it is larger than the sum of its proper divisors (326471614).

641536706 is a wasteful number, since it uses less digits than its factorization.

641536706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 641536706 is about 25328.5748908224. The cubic root of 641536706 is about 862.4630606878.

The spelling of 641536706 in words is "six hundred forty-one million, five hundred thirty-six thousand, seven hundred six".