641850646 has 8 divisors (see below), whose sum is σ = 966203064. Its totient is φ = 319782960.

The previous prime is 641850631. The next prime is 641850661. The reversal of 641850646 is 646058146.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (641850631) and next prime (641850661).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 641850599 and 641850608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570480 + ... + 571603.

It is an arithmetic number, because the mean of its divisors is an integer number (120775383).

Almost surely, 2^641850646 is an apocalyptic number.

641850646 is a deficient number, since it is larger than the sum of its proper divisors (324352418).

641850646 is a wasteful number, since it uses less digits than its factorization.

641850646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142366.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 641850646 is about 25334.7714811087. The cubic root of 641850646 is about 862.6037216437.

The spelling of 641850646 in words is "six hundred forty-one million, eight hundred fifty thousand, six hundred forty-six".