641084686 has 16 divisors (see below), whose sum is σ = 1063420848. Its totient is φ = 287409600.

The previous prime is 641084683. The next prime is 641084687. The reversal of 641084686 is 686480146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641084683) 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, 197985 + ... + 201196.

It is an arithmetic number, because the mean of its divisors is an integer number (66463803).

Almost surely, 2^641084686 is an apocalyptic number.

641084686 is a deficient number, since it is larger than the sum of its proper divisors (422336162).

641084686 is a wasteful number, since it uses less digits than its factorization.

641084686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399267.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 641084686 is about 25319.6501950560. The cubic root of 641084686 is about 862.2604523016.

The spelling of 641084686 in words is "six hundred forty-one million, eighty-four thousand, six hundred eighty-six".